The Collaborative International Dictionary of English v.0.48:

Steady \Stead"y\ (-[y^]), a. [Compar. Steadier (-[i^]*[~e]r);
   superl. Steadiest.] [Cf. AS. stedig sterile, barren,
   stae[eth][eth]ig, steady (in gestae[eth][eth]ig), D. stedig,
   stadig, steeg, G. st[aum]tig, stetig. See Stead, n.]
   1. Firm in standing or position; not tottering or shaking;
      fixed; firm. "The softest, steadiest plume." --Keble.
      [1913 Webster]

            Their feet steady, their hands diligent, their eyes
            watchful, and their hearts resolute.  --Sir P.
                                                  Sidney.
      [1913 Webster]

   2. Constant in feeling, purpose, or pursuit; not fickle,
      changeable, or wavering; not easily moved or persuaded to
      alter a purpose; resolute; as, a man steady in his
      principles, in his purpose, or in the pursuit of an
      object.
      [1913 Webster]

   3. Regular; constant; undeviating; uniform; as, the steady
      course of the sun; a steady breeze of wind.
      [1913 Webster]

   Syn: Fixed; regular; uniform; undeviating; invariable;
        unremitted; stable.
        [1913 Webster]

   Steady rest (Mach), a rest in a turning lathe, to keep a
      long piece of work from trembling.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Steady \Stead"y\, v. t. [imp. & p. p. Steadied (-[i^]d); p.
   pr. & vb. n. Steadying.]
   To make steady; to hold or keep from shaking, reeling, or
   falling; to make or keep firm; to support; to make constant,
   regular, or resolute.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Steady \Stead"y\, v. i.
   To become steady; to regain a steady position or state; to
   move steadily.
   [1913 Webster]

         Without a breeze, without a tide,
         She steadies with upright keel.          --Coleridge.
   [1913 Webster]

WordNet (r) 3.0 (2006):

steady
    adv 1: in a steady manner; "he could still walk steadily" [syn:
           steadily, steady] [ant: falteringly, uncertainly,
           unsteadily]
    adj 1: not subject to change or variation especially in
           behavior; "a steady beat"; "a steady job"; "a steady
           breeze"; "a steady increase"; "a good steady ballplayer"
           [ant: unsteady]
    2: not liable to fluctuate or especially to fall; "stocks are
       still firm" [syn: firm, steady, unfluctuating]
    3: securely in position; not shaky; "held the ladder steady"
    4: marked by firm determination or resolution; not shakable;
       "firm convictions"; "a firm mouth"; "steadfast resolve"; "a
       man of unbendable perseverence"; "unwavering loyalty" [syn:
       firm, steadfast, steady, stiff, unbendable,
       unfaltering, unshakable, unwavering]
    5: relating to a person who does something regularly; "a regular
       customer"; "a steady drinker" [syn: regular, steady]
    6: not easily excited or upset; "steady nerves"
    n 1: a person loved by another person [syn: sweetheart,
         sweetie, steady, truelove]
    v 1: make steady; "steady yourself" [syn: steady, calm,
         becalm]
    2: support or hold steady and make steadfast, with or as if with
       a brace; "brace your elbows while working on the potter's
       wheel" [syn: brace, steady, stabilize, stabilise]

Moby Thesaurus II by Grady Ward, 1.0:

409 Moby Thesaurus words for "steady":
   abiding, accordant, adamantine, ageless, alike, alternate, appease,
   ardent, arranged, articulated, assiduous, automatic, balance,
   balanced, ballast, beating, beau, beloved, bovine, boyfriend,
   brace, bulky, businesslike, calculable, calm, calm down, captive,
   catch, catenated, ceaseless, certain, changeless, chattering,
   circling, civilized, coeternal, compose, concatenated, confirmed,
   connected, conquest, consistent, consonant, constant, continual,
   continued, continuing, continuous, controlled, cool, coolheaded,
   coquette, correspondent, counterbalance, cradle, customer, cyclic,
   cyclical, date, dateless, dense, dependable, devoted, dignified,
   diligent, direct, dispassionate, dogged, down-to-earth, dulcify,
   dull, durable, ease, endless, enduring, epochal, equable, equal,
   eternal, eterne, even, even out, even-tempered, ever-being,
   ever-durable, ever-during, everlasting, everliving, every other,
   fail-safe, faithful, faithworthy, fast, featureless, fiducial,
   firm, firm as Gibraltar, firm up, firmly, fixed, flame, flat,
   flinty, flirt, formal, freeze, frequenter, gal, gapless, gentle,
   guaranteed, guy, habitual, habitue, hard, harmless, harmonious,
   hold, hold fast, homogeneous, honey, hush, immediate, immemorial,
   immobilize, immovable, immutable, impassive, imperturbable,
   in equilibrium, in hand, inalterable, inamorata, inamorato,
   incessant, indefatigable, indestructible, indomitable, industrious,
   inexcitable, infinite, inflexible, inirritable, insistent,
   interminable, intermittent, invariable, inveterate, invincible,
   invulnerable, isochronal, joined, jointless, keep, ladylove,
   lasting, level, level-headed, liege, linked, long-standing, lover,
   loyal, lull, machine gun, man, marble-constant, massive, measured,
   mechanical, methodic, methodical, metronomic, mollify, monolithic,
   monotonous, nail down, nerveless, never-ceasing, never-ending,
   never-failing, never-tiring, nonstop, nonterminating, nonterminous,
   normal, obstinate, of a piece, olamic, ordered, orderly,
   oscillating, oscillatory, pacify, patient, patient as Job,
   perdurable, perennial, periodic, periodical, permanent, perpetual,
   perseverant, persevering, persistent, persisting, pertinacious,
   pin down, plodding, plugging, poise, poised, pour balm into,
   predictable, preoccupied, pulsating, pulsing, quell, quiet, rapid,
   rapt, reciprocal, recurrent, recurring, regular, relaxed,
   relentless, reliable, remaining, repeated, repetitive, resolute,
   rest, retain, rhythmic, riskless, robotlike, rock, rock to sleep,
   rock-steady, rotary, round-the-clock, routine, rugged, running,
   seamless, seasonal, secure, sedate, sedulous, sempiternal,
   sensible, serial, serious, serried, set, settled, single-minded,
   sleepless, slogging, smooth, smooth down, smooth over, smoothen,
   sober, socialize, solid, solidly, soothe, sophisticated, sot,
   sound, stabile, stabilitate, stabilize, stable, staccato, staid,
   staunch, staying, steadfast, steady-handed, steady-nerved,
   steel-nerved, steely, stick, sticking, still, stoic, stolid, stout,
   straight, strengthen, strong, strong-nerved, stubborn, sturdy,
   stuttering, subdue, substantial, support, sure, surefire,
   sustained, sweet patootie, sweetheart, sweetie, symmetrical,
   systematic, tenacious, timeless, tireless, tough, tranquilize,
   transfix, true, true-blue, truelove, trustworthy, trusty,
   twenty-four-hour, unabating, unbending, unblenching, unblinking,
   unbroken, unceasing, unchangeable, unchanged, unchanging,
   unconquerable, undangerous, undaunted, undeflectable, undeviating,
   undifferentiated, undiscouraged, undisturbable, undiversified,
   undrooping, undulant, undulatory, undying, unending, unfailing,
   unfaltering, unflagging, unflappable, unflinching, unhazardous,
   uniform, unintermitted, unintermittent, unintermitting,
   uninterrupted, unirritable, unnervous, unnodding, unpassionate,
   unperilous, unprecarious, unqualified, unquestioning, unquivering,
   unrelaxing, unrelenting, unrelieved, unremitting, unrisky,
   unruffled, unshakable, unshaken, unshaky, unshrinking, unsleeping,
   unstopped, unstrained, unswerving, untiring, untremulous, unvaried,
   unvarying, unwavering, unwearied, unwearying, unwinking,
   unyielding, usual, utterly attentive, vamp, vampire, vibrating,
   warranteed, wavelike, weariless, well-balanced, well-built,
   well-constructed, well-founded, well-grounded, well-made,
   well-ordered, well-regulated, wheeling, wholehearted,
   without a tremor, without end, without nerves, woman