The Collaborative International Dictionary of English v.0.48:

Express \Ex*press"\ ([e^]ks*pr[e^]s"), a. [F. expr[`e]s, L.
   expressus, p. p. of exprimere to express; ex. out + premere
   To press. See Press.]
   1. Exactly representing; exact.
      [1913 Webster]

            Their human countenance
            The express resemblance of the gods.  --Milton.
      [1913 Webster]

   2. Directly and distinctly stated; declared in terms; not
      implied or left to inference; made unambiguous by
      intention and care; clear; not dubious; as, express
      consent; an express statement.
      [1913 Webster]

            I have express commandment.           --Shak.
      [1913 Webster]

   3. Intended for a particular purpose; relating to an express;
      sent on a particular errand; dispatched with special
      speed; as, an express messenger or train. Also used
      adverbially.
      [1913 Webster]

            A messenger sent express from the other world.
                                                  --Atterbury.
      [1913 Webster]

   2. of or pertaining to an express train or other conveyance
      designated an express[5]; makiung few or no intermediate
      stops; as, an express stop; an express fare; an express
      elevator.
      [PJC]

   Express color. (Law) See the Note under Color, n., 8.

   Syn: Explicit; clear; unambiguous. See Explicit.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Express \Ex*press"\, v. t. [imp. & p. p. Expressed; p. pr. &
   vb. n. Expressing.] [Cf. OF. espresser, expresser, L.
   exprimere, expressum. See Express, a.; cf. Sprain.]
   1. To press or squeeze out; as, to express the juice of
      grapes, or of apples; hence, to extort; to elicit.
      [1913 Webster]

            All the fruits out of which drink is expressed.
                                                  --Bacon.
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            And th'idle breath all utterly expressed. --Spenser.
      [1913 Webster]

            Halters and racks can not express from thee
            More than by deeds.                   --B. Jonson.
      [1913 Webster]

   2. To make or offer a representation of; to show by a copy or
      likeness; to represent; to resemble.
      [1913 Webster]

            Each skillful artist shall express thy form. --E.
                                                  Smith.
      [1913 Webster]

            So kids and whelps their sires and dams express.
                                                  --Dryden.
      [1913 Webster]

   3. To give a true impression of; to represent and make known;
      to manifest plainly; to show in general; to exhibit, as an
      opinion or feeling, by a look, gesture, and esp. by
      language; to declare; to utter; to tell.
      [1913 Webster]

            My words express my purpose.          --Shak.
      [1913 Webster]

            They expressed in their lives those excellent
            doctrines of morality.                --Addison.
      [1913 Webster]

   4. To make known the opinions or feelings of; to declare what
      is in the mind of; to show (one's self); to cause to
      appear; -- used reflexively.
      [1913 Webster]

            Mr. Phillips did express with much indignation
            against me, one evening.              --Pope.
      [1913 Webster]

   5. To denote; to designate.
      [1913 Webster]

            Moses and Aaron took these men, which are expressed
            by their names.                       --Num. i. 17.
      [1913 Webster]

   6. To send by express messenger; to forward by special
      opportunity, or through the medium of an express; as, to
      express a package.

   7. (Genetics) to produce products that cause the appearance
      of the corresponding phenotype; -- of a gene or of an
      organism with a specific gene; as, to express the
      beta-galactosidase gene,
      [PJC]

   Syn: To declare; utter; signify; testify; intimate.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Express \Ex*press"\, n. [Cf. F. expr[`e]s a messenger.]
   1. A clear image or representation; an expression; a plain
      declaration. [Obs.]
      [1913 Webster]

            The only remanent express of Christ's sacrifice on
            earth.                                --Jer. Taylor.
      [1913 Webster]

   2. A messenger sent on a special errand; a courier; hence, a
      regular and fast conveyance; commonly, a company or system
      for the prompt and safe transportation of merchandise or
      parcels.
      [1913 Webster]

   3. An express office.
      [1913 Webster]

            She charged him . . . to ask at the express if
            anything came up from town.           --E. E. Hale.
      [1913 Webster]

   4. That which is sent by an express messenger or message.
      [Obs.] --Eikon Basilike.
      [1913 Webster]

   5. a railway train or bus for transporting passengers or
      goods with speed and punctuality; a train or bus that does
      not stop at certain stations. Contrasted to local; as,
      take the express to get there faster.

   Syn: express train. [PJC]

   Express office, an office where packages for an express are
      received or delivered.

   Express train, a railway train (such as a subway train)
      that does not stop at certain stations, but only at
      stations designated express stops.
      [1913 Webster]

WordNet (r) 3.0 (2006):

express
    adv 1: by express; "please send the letter express"
    adj 1: not tacit or implied; "her express wish"
    2: without unnecessary stops; "an express train"; "an express
       shipment"
    n 1: mail that is distributed by a rapid and efficient system
         [syn: express, express mail]
    2: public transport consisting of a fast train or bus that makes
       only a few scheduled stops; "he caught the express to New
       York" [syn: express, limited] [ant: local]
    3: rapid transport of goods [syn: express, expressage]
    v 1: give expression to; "She showed her disappointment" [syn:
         express, show, evince]
    2: articulate; either verbally or with a cry, shout, or noise;
       "She expressed her anger"; "He uttered a curse" [syn:
       express, verbalize, verbalise, utter, give tongue
       to]
    3: serve as a means for expressing something; "The painting of
       Mary carries motherly love"; "His voice carried a lot of
       anger" [syn: carry, convey, express]
    4: indicate through a symbol, formula, etc.; "Can you express
       this distance in kilometers?" [syn: express, state]
    5: manifest the effects of (a gene or genetic trait); "Many of
       the laboratory animals express the trait"
    6: obtain from a substance, as by mechanical action; "Italians
       express coffee rather than filter it" [syn: press out,
       express, extract]
    7: send by rapid transport or special messenger service; "She
       expressed the letter to Florida"

Moby Thesaurus II by Grady Ward, 1.0:

561 Moby Thesaurus words for "express":
   Amtrak, Aquarius, Ganymede, Hebe, Hermes, Iris, Mercury, PP,
   Paul Revere, Pheidippides, RD, RFD, absolute, accurate,
   admitting no exception, advice, affect, affirm, agile, air,
   air-express, airfreight, airmail, all-out, allege, announce,
   annunciate, apparent, approve, argue, articulate, assert, assever,
   asseverate, attest, aver, avouch, avow, baggage train,
   be indicative of, be significant of, be symptomatic of, bearer,
   bespeak, betoken, bheesty, book post, brandish, breakneck, breathe,
   bring forth, bring forward, bring into view, bring out,
   bring to life, bring to notice, broach, busboy, by airmail,
   by cable, by express, by return mail, by telegraph, cable railroad,
   caddie, cargo handler, carrier, carrier pigeon, carter,
   categorical, certain, character, characterize, chime, choo-choo,
   chorus, circulate, clean-cut, clear, clear as crystal,
   clear as day, clear-cut, close, cog railroad, cog railway,
   coherent, come out with, commissionaire, common carrier,
   communicate, communication, communique, complete, conceive,
   concentrate, conclusive, concrete, connected, connote, consign,
   consistent, constant, contend, convey, conveyer, coolie,
   correspondence, couch, couch in terms, courier, crisp, crush,
   crystal-clear, crystalline, cupbearer, dangle, dashing, decided,
   decisive, declare, decoct, defined, definite, definitive, delicate,
   delineate, deliver, demonstrate, denominate, denote, depict,
   describe, designate, detailed, determinate, develop, different,
   differentiate, diplomatic courier, direct, direct mail,
   direct-mail selling, discernible, discharge, disclose, dispatch,
   display, distill, distinct, distinguished, divulge, double-quick,
   downright, drain, dramatize, draw, drayman, drop a letter,
   eagle-winged, el, electric, electric train, elevated, embark,
   embassy, embody, embody in words, emissary, emit, enact, entail,
   entire, enunciate, esoteric, especial, essentialize, estafette,
   even, evidence, evident, evince, evoke, exact, exceptional,
   exhibit, expedite, expeditious, expel, explicit, export, expose,
   expose to view, express train, expressed, expressman, extract,
   extraordinary, faithful, fast, final, fine, fixed, flat, flat-out,
   flaunt, fleet, flier, fling off, flourish, flying, force out,
   formularize, formulate, forward, fourth-class mail, frame, frank,
   freight, freight train, freighter, funicular, furnish evidence,
   galloping, get across, give, give evidence, give expression,
   give expression to, give indication of, give out with, give sign,
   give token, give tongue, give utterance, give voice, give words to,
   global, go to show, go-between, goods train, gun bearer,
   hair-trigger, halfpenny post, hasty, hauler, have, headlong,
   highlight, hint, hold, homing pigeon, hustling, identify,
   illuminate, illustrate, immediate, impart, implicit, imply, import,
   in posthaste, inappealable, incarnate, indicate, indisputable,
   individual, indubitable, inerrable, inerrant, infallible, infuse,
   inner, insist, intend, intended, intentional, interurban, intimate,
   involve, issue a manifesto, junk mail, lay down, let out, letter,
   letter carrier, letter post, letters, light of heel, light-footed,
   lightning express, limited, limn, limpid, lip, litter-bearer,
   lively, local, loud and clear, lucid, luminous, mail,
   mail-order selling, mailing list, maintain, make clear, make known,
   make plain, manifest, manifesto, mark, materialize, mathematical,
   mean, melt down, mercurial, message, message-bearer, messenger,
   metro, micrometrically precise, microscopic, milk train, minute,
   monorail, newspaper post, nice, nimble, nimble-footed, note,
   noteworthy, noticeable, nuncio, observable, obvious, open-and-shut,
   out-and-out, outline, outright, paint, palpable, parade, paragraph,
   parcel post, parliamentary, parliamentary train, particular,
   passenger train, patent, pellucid, perceivable, perceptible,
   peremptory, perfect, perform, personal, perspicuous, phonate,
   phrase, picture, pinpoint, plain, plain as day, pneumatogram,
   point to, porter, portray, positive, post, post day, postboy,
   posthaste, postrider, pour forth, precipitate, precise, predicate,
   premeditated, present, press out, private, proclaim, produce,
   profess, prompt, pronounce, protest, put, put about, put across,
   put forth, put in words, put it, quick, quick as lightning,
   quick as thought, rack-and-pinion railroad, railroad train, raise,
   rapid, rattler, reckless, redcap, refine, refined, registered mail,
   release, religious, religiously exact, remit, render, represent,
   respective, reveal, rhetorize, rigid, rigorous, roll out,
   rolling stock, round, runner, running, rural delivery,
   rural free delivery, say, scientific, scientifically exact,
   sea mail, seapost, seeable, self-evident, self-explaining,
   self-explanatory, send, send away, send forth, send off, set,
   set down, set forth, set out, several, severe, shield-bearer, ship,
   show, show forth, show signs of, shuttle, shuttle train, signalize,
   signify, simple, singular, sketch, skycap, snappy, soak,
   solipsistic, sound, spanking, speak, speak for itself, speak out,
   speak up, speak volumes, special, special delivery,
   special handling, specific, speedy, spell, spotlight, square,
   stand for, stand on, state, steep, stevedore, straight,
   straight-out, straightforward, streamliner, stretcher-bearer,
   strict, style, submit, subtle, subway, suggest, surface mail,
   swift, symbolize, symptomatize, symptomize, tangible, telegram,
   tell, tend to show, testify, the Water Bearer, throw off,
   to be seen, token, total, train, translucent, transmit,
   transparent, transpicuous, transporter, trot out, truck driver,
   trucker, true, tube, unambiguous, uncircumscribed, unconditional,
   unconditioned, unconfused, underground, undeviating, undoubting,
   unequivocal, unerring, unfold, unhampered, unhesitating, univocal,
   unlimited, unmistakable, unmitigated, unqualified, unquestioning,
   unreserved, unrestricted, unwaivable, utter, uttered, vent,
   ventilate, verbalize, visible, vocalize, voice, voiced, wagoner,
   water boy, water carrier, wave, way train, well-defined, whisper,
   whole, winged, without exception, without reserve, word, wring,
   wring out, write



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

Express

   1. A language supporting concurrency through message
   passing to named message queues from ParaSoft Corporation

   (ftp://ftp.parasoft.com/express/docs).

   2. Data definition language, meant to become an ISO standard
   for product data representation and exchange.  TC 184/SC4 N83,
   ISO, 1991-05-31.  E-mail: .

   3. A data modelling language adopted by the ISO working
   group on STEP.


Bouvier's Law Dictionary, Revised 6th Ed (1856):

EXPRESS. That which is made known, and not left to implication. The opposite
of implied. It is a rule, that when a matter or thing is expressed, it
ceases to be implied by law: expressum facit cessare tacitum. Co. Litt. 183;
1 Bouv. Inst. n. 97.