The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, n. [AS. sund a swimming, akin to E. swim. See
   Swim.]
   The air bladder of a fish; as, cod sounds are an esteemed
   article of food.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, n. (Zool.)
   A cuttlefish. [Obs.] --Ainsworth.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, a. [Compar. Sounder; superl. Soundest.] [OE.
   sound, AS. sund; akin to D. gezond, G. gesund, OHG. gisunt,
   Dan. & Sw. sund, and perhaps to L. sanus. Cf. Sane.]
   1. Whole; unbroken; unharmed; free from flaw, defect, or
      decay; perfect of the kind; as, sound timber; sound fruit;
      a sound tooth; a sound ship.
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   2. Healthy; not diseased; not being in a morbid state; --
      said of body or mind; as, a sound body; a sound
      constitution; a sound understanding.
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   3. Firm; strong; safe.
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            The brasswork here, how rich it is in beams,
            And how, besides, it makes the whole house sound.
                                                  --Chapman.
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   4. Free from error; correct; right; honest; true; faithful;
      orthodox; -- said of persons; as, a sound lawyer; a sound
      thinker.
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            Do not I know you a favorer
            Of this new seat? Ye are nor sound.   --Shak.
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   5. Founded in truth or right; supported by justice; not to be
      overthrown on refuted; not fallacious; as, sound argument
      or reasoning; a sound objection; sound doctrine; sound
      principles.
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            Hold fast the form of sound words, which thou hast
            heard of me.                          --2 Tim. i.
                                                  13.
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   6. heavy; laid on with force; as, a sound beating.
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   7. Undisturbed; deep; profound; as, sound sleep.
      [1913 Webster]

   8. Founded in law; legal; valid; not defective; as, a sound
      title to land.
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   Note: Sound is sometimes used in the formation of
         self-explaining compounds; as, sound-headed,
         sound-hearted, sound-timbered, etc.
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   Sound currency (Com.), a currency whose actual value is the
      same as its nominal value; a currency which does not
      deteriorate or depreciate or fluctuate in comparision with
      the standard of values.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, n. [F. sonde. See Sound to fathom.] (Med.)
   Any elongated instrument or probe, usually metallic, by which
   cavities of the body are sounded or explored, especially the
   bladder for stone, or the urethra for a stricture.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, v. i.
   To ascertain the depth of water with a sounding line or other
   device.
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         I sound as a shipman soundeth in the sea with his
         plummet to know the depth of sea.        --Palsgrave.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, adv.
   Soundly.
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         So sound he slept that naught might him awake.
                                                  --Spenser.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, n. [AS. sund a narrow sea or strait; akin to
   Icel., Sw., Dan. & G. sund, probably so named because it
   could be swum across. See Swim.] (Geog.)
   A narrow passage of water, or a strait between the mainland
   and an island; also, a strait connecting two seas, or
   connecting a sea or lake with the ocean; as, the Sound
   between the Baltic and the german Ocean; Long Island Sound.
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         The Sound of Denmark, where ships pay toll. --Camden.
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   Sound dues, tolls formerly imposed by Denmark on vessels
      passing through the Baltic Sound.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, v. t. [imp. & p. p. Sounded; p. pr. & vb. n.
   Sounding.] [F. sonder; cf. AS. sundgyrd a sounding rod,
   sundline a sounding line (see Sound a narrow passage of
   water).]
   1. To measure the depth of; to fathom; especially, to
      ascertain the depth of by means of a line and plummet.
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   2. Fig.: To ascertain, or try to ascertain, the thoughts,
      motives, and purposes of (a person); to examine; to try;
      to test; to probe.
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            I was in jest,
            And by that offer meant to sound your breast.
                                                  --Dryden.
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            I've sounded my Numidians man by man. --Addison.
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   3. (Med.) To explore, as the bladder or urethra, with a
      sound; to examine with a sound; also, to examine by
      auscultation or percussion; as, to sound a patient.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, v. t.
   1. To cause to make a noise; to play on; as, to sound a
      trumpet or a horn; to sound an alarm.
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            A bagpipe well could he play and soun[d]. --Chaucer.
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   2. To cause to exit as a sound; as, to sound a note with the
      voice, or on an instrument.
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   3. To order, direct, indicate, or proclain by a sound, or
      sounds; to give a signal for by a certain sound; as, to
      sound a retreat; to sound a parley.
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            The clock sounded the hour of noon.   --G. H. Lewes.
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   4. To celebrate or honor by sounds; to cause to be reported;
      to publish or proclaim; as, to sound the praises of fame
      of a great man or a great exploit.
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   5. To examine the condition of (anything) by causing the same
      to emit sounds and noting their character; as, to sound a
      piece of timber; to sound a vase; to sound the lungs of a
      patient.
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   6. To signify; to import; to denote. [Obs.] --Milton.
      [1913 Webster]

            Soun[d]ing alway the increase of his winning.
                                                  --Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, n. [OE. soun, OF. son, sun, F. son, fr. L. sonus
   akin to Skr. svana sound, svan to sound, and perh. to E.
   swan. Cf. Assonant, Consonant, Person, Sonata,
   Sonnet, Sonorous, Swan.]
   1. The peceived object occasioned by the impulse or vibration
      of a material substance affecting the ear; a sensation or
      perception of the mind received through the ear, and
      produced by the impulse or vibration of the air or other
      medium with which the ear is in contact; the effect of an
      impression made on the organs of hearing by an impulse or
      vibration of the air caused by a collision of bodies, or
      by other means; noise; report; as, the sound of a drum;
      the sound of the human voice; a horrid sound; a charming
      sound; a sharp, high, or shrill sound.
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            The warlike sound
            Of trumpets loud and clarions.        --Milton.
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   2. The occasion of sound; the impulse or vibration which
      would occasion sound to a percipient if present with
      unimpaired; hence, the theory of vibrations in elastic
      media such cause sound; as, a treatise on sound.
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   Note: In this sense, sounds are spoken of as audible and
         inaudible.
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   3. Noise without signification; empty noise; noise and
      nothing else.
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            Sense and not sound . . . must be the principle.
                                                  --Locke.
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   Sound boarding, boards for holding pugging, placed in
      partitions of under floors in order to deaden sounds.

   Sound bow, in a series of transverse sections of a bell,
      that segment against which the clapper strikes, being the
      part which is most efficacious in producing the sound. See
      Illust. of Bell.

   Sound post. (Mus.) See Sounding post, under Sounding.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sound \Sound\, v. i. [OE. sounen, sownen, OF. soner, suner, F.
   sonner, from L. sonare. See Sound a noise.]
   1. To make a noise; to utter a voice; to make an impulse of
      the air that shall strike the organs of hearing with a
      perceptible effect. "And first taught speaking trumpets
      how to sound." --Dryden.
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            How silver-sweet sound lovers' tongues! --Shak.
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   2. To be conveyed in sound; to be spread or published; to
      convey intelligence by sound.
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            From you sounded out the word of the Lord. --1
                                                  Thess. i. 8.
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   3. To make or convey a certain impression, or to have a
      certain import, when heard; hence, to seem; to appear; as,
      this reproof sounds harsh; the story sounds like an
      invention.
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            Good sir, why do you start, and seem to fear
            Things that do sound so fair?         --Shak.
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   To sound in or To sound into, to tend to; to partake of
      the nature of; to be consonant with. [Obs., except in the
      phrase To sound in damages, below.]
      [1913 Webster]

            Soun[d]ing in moral virtue was his speech.
                                                  --Chaucer.
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   To sound in damages (Law), to have the essential quality of
      damages. This is said of an action brought, not for the
      recovery of a specific thing, as replevin, etc., but for
      damages only, as trespass, and the like.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sound
    adj 1: financially secure and safe; "sound investments"; "a
           sound economy" [ant: unsound]
    2: exercising or showing good judgment; "healthy scepticism"; "a
       healthy fear of rattlesnakes"; "the healthy attitude of
       French laws"; "healthy relations between labor and
       management"; "an intelligent solution"; "a sound approach to
       the problem"; "sound advice"; "no sound explanation for his
       decision" [syn: healthy, intelligent, levelheaded,
       level-headed, sound]
    3: in good condition; free from defect or damage or decay; "a
       sound timber"; "the wall is sound"; "a sound foundation"
       [ant: unsound]
    4: in excellent physical condition; "good teeth"; "I still have
       one good leg"; "a sound mind in a sound body" [syn: good,
       sound]
    5: logically valid; "a sound argument" [syn: reasoned,
       sound, well-grounded]
    6: having legal efficacy or force; "a sound title to the
       property" [syn: legal, sound, effectual]
    7: free from moral defect; "a man of sound character"
    8: (of sleep) deep and complete; "a heavy sleep"; "fell into a
       profound sleep"; "a sound sleeper"; "deep wakeless sleep"
       [syn: heavy, profound, sound, wakeless]
    9: thorough; "a sound thrashing"
    n 1: the particular auditory effect produced by a given cause;
         "the sound of rain on the roof"; "the beautiful sound of
         music" [ant: quiet, silence]
    2: the subjective sensation of hearing something; "he strained
       to hear the faint sounds" [syn: sound, auditory
       sensation]
    3: mechanical vibrations transmitted by an elastic medium;
       "falling trees make a sound in the forest even when no one is
       there to hear them"
    4: the sudden occurrence of an audible event; "the sound
       awakened them"
    5: the audible part of a transmitted signal; "they always raise
       the audio for commercials" [syn: audio, sound]
    6: (phonetics) an individual sound unit of speech without
       concern as to whether or not it is a phoneme of some language
       [syn: phone, speech sound, sound]
    7: a narrow channel of the sea joining two larger bodies of
       water [syn: strait, sound]
    8: a large ocean inlet or deep bay; "the main body of the sound
       ran parallel to the coast"
    v 1: appear in a certain way; "This sounds interesting"
    2: make a certain noise or sound; "She went `Mmmmm'"; "The gun
       went `bang'" [syn: sound, go]
    3: give off a certain sound or sounds; "This record sounds
       scratchy"
    4: announce by means of a sound; "sound the alarm"
    5: utter with vibrating vocal chords [syn: voice, sound,
       vocalize, vocalise] [ant: devoice]
    6: cause to sound; "sound the bell"; "sound a certain note"
    7: measure the depth of (a body of water) with a sounding line
       [syn: fathom, sound]

Moby Thesaurus II by Grady Ward, 1.0:

528 Moby Thesaurus words for "sound":
   Christian, able to pay, accepted, adamantine, admissible,
   advantageous, advertise, all there, announce, annunciate, appear,
   appear like, appraise, appreciate, approved, arm, armlet,
   articulate, aspect, assay, assess, astute, auditory range,
   auspicious, authentic, authoritative, bagpipe, balanced, barometer,
   bay, bayou, be reflected, be sent back, beep, bell, belt,
   beneficial, benevolent, bight, binding, bitch, blare, blast, blat,
   blooming, blow, blow a horn, blow the horn, bluster, boca, bon,
   bonny, boom, bounce back, braw, bray, breathe, broadcast, bueno,
   bugle, bulky, bunkum, cacophony, calculable, calculate, calibrate,
   caliper, canonical, canvass, capital, carillon, carrying distance,
   cast the lead, characteristic, check a parameter, check out, chime,
   chink, chorus, clang, clangor, clank, clarion, clearheaded,
   clearminded, clink, cogent, come out with, commendable,
   commonsense, communicate, complain, complete, compos mentis,
   compute, conservative, consistent, conventional, convey, cool,
   coolheaded, correct, cove, credible, creek, cry out, customary,
   deep, deliver, delve into, dense, dependable, dial, dig into, din,
   ding, dingdong, disclose, disseminate, dive, divide, dong, doodle,
   double-tongue, down-to-earth, drop, durable, earreach, earshot,
   earthy, echo, echo back, effect, elegant, emit, emit a sound,
   enduring, entire, enunciate, estimable, estimate, estuary, euripus,
   evaluate, evangelical, examine, excellent, expedient, explore,
   express, fail-safe, fair, faithful, faithworthy, fall, famous,
   fast, fathom, favorable, feel, feel out, feeler, fiducial, fife,
   fine, fiord, firm, firm as Gibraltar, firth, fit, fjord, fling off,
   flute, fly a kite, formulate, frith, full, gauge, give,
   give expression, give out with, give tongue, give utterance,
   give voice, go into, gong, good, good for, goodly, graduate, grand,
   grumble, guaranteed, gulf, gut, hale, hale and hearty, harbor,
   hard, hardheaded, harmless, healthy, healthy-minded, hearing,
   heavy, helpful, honk, impart, imperturbable, impression,
   in equilibrium, in good condition, in good shape, indagate,
   infrangible, inlet, inquire of, intact, integral, investigate,
   invincible, invulnerable, jangle, jingle, jinglejangle, judicious,
   just, justifiable, kind, knell, kyle, lasting, laudable, lawful,
   legal, legitimate, let out, levelheaded, lip, literal, loch,
   logical, look, look into, look like, lucid, made of iron,
   make a noise, make a sound, make a sounding, massive,
   matter-of-fact, measure, mensurate, mentally sound, mete, meter,
   mouth, narrow, narrow seas, narrows, natural harbor, nice, noble,
   noise, normal, nose-dive, of sound mind, of the faith, orthodox,
   orthodoxical, out with, pace, parachute, peaceful, peal, peer into,
   perceptive, percipient, perfect, perspicacious, philosophical,
   phonate, phrase, pilot balloon, pipe, pitch, plausible, pleasant,
   plop, plumb, plumb the depths, plumb-line, plummet, plump, plunge,
   plunk, poke into, politic, poll, positivistic, pounce, pounce on,
   pounce upon, pour forth, practical, practical-minded, pragmatic,
   predictable, present, prize, probe, proclaim, profitable,
   promulgate, pronounce, proper, prudent, pry into, publish,
   put forth, put in words, quality, quantify, quantize, question,
   raise, random sample, range, rate, rational, reach, read, realist,
   realistic, reasonable, reasoning, rebound, received, reecho, regal,
   reliable, report, resemble, resonance, resonate, resound,
   responsible, return, reverberate, reverberation, right,
   right-minded, rigid, ring, ring changes, riskless, road, roads,
   roadstead, robust, roll, rosy, royal, ruddy, rugged, rumble, safe,
   sample, sane, sane-minded, say, scientific, scientistic,
   scriptural, search into, secular, secure, seem, seem like,
   seem to be, self-consistent, send back, sensible, set forth,
   shout out, shriek, sift, signal, size, size up, skillful,
   skin-dive, sky-dive, sling the lead, sober, sober-minded, solid,
   solvent, sonance, sound a knell, sound a tattoo, sound like,
   sound out, sound taps, sound-minded, sound-thinking, sounder, span,
   speak, splendid, squeal, stable, standard, staunch, steadfast,
   steady, step, stoop, stout, straight-thinking, strait, straits,
   straw vote, strong, sturdy, submerge, substantial, sufficient,
   sure, surefire, survey, swoop, swoop down, take a header,
   take a reading, take soundings, tell, test, textual, throw off,
   ting, tingle, tink, tinkle, tintinnabulate, together, toll, tone,
   tongue, toot, tootle, total, tough, traditional, traditionalistic,
   trial balloon, triangulate, triple-tongue, true, true-blue,
   trumpet, trustworthy, trusty, tweedle, unbreakable, unbroken,
   undamaged, undangerous, undisturbed, unfailing, unflappable,
   unflinching, unhazardous, unideal, unidealistic, unimpaired,
   unindebted, uninjured, uninterrupted, unmarred, unperilous,
   unprecarious, unqualified, unrisky, unromantic, unscathed,
   unsentimental, unshakable, untroubled, unwavering, unyielding,
   useful, utter, valid, valuate, value, verbalize, very good,
   vibration, vigorous, virtuous, vituperate, vocalize, voice,
   warranteed, weather vane, weathercock, weigh, weighty, well,
   well-argued, well-balanced, well-built, well-constructed,
   well-founded, well-grounded, well-made, whisper, whistle, whole,
   wholesome, wind, wind the horn, wise, without nerves, word,
   yell out



The Free On-line Dictionary of Computing (30 December 2018):

sound

   1. audio.

   2.  An inference system A is sound with respect to
   another system B if A can only reach conclusions which are
   true in B.  A type inference system is considered sound with
   respect to a semantics if the type inferred for an
   expression is the same as the type inferred for the meaning of
   that expression under the semantics.

   The dual to soundness is completeness.

   (1995-03-01)