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.
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            Halters and racks can not express from thee
            More than by deeds.                   --B. Jonson.
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   2. To make or offer a representation of; to show by a copy or
      likeness; to represent; to resemble.
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            Each skillful artist shall express thy form. --E.
                                                  Smith.
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            So kids and whelps their sires and dams express.
                                                  --Dryden.
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   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.
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            My words express my purpose.          --Shak.
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            They expressed in their lives those excellent
            doctrines of morality.                --Addison.
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   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.
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            Mr. Phillips did express with much indignation
            against me, one evening.              --Pope.
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   5. To denote; to designate.
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            Moses and Aaron took these men, which are expressed
            by their names.                       --Num. i. 17.
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   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.
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The Collaborative International Dictionary of English v.0.48:

expressed \expressed\ adj.
   1. Communicated in words.

   Syn: uttered, verbalized.
        [WordNet 1.5]

   2. Precisely and clearly expressed, leaving nothing to
      implication. Opposite of implicit. [Narrower terms:
      graphic] Also See: definite, denotative, denotive,
      overt, open, unequivocal, unambiguous.

   Syn: explicit, express.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

expressed
    adj 1: communicated in words; "frequently uttered sentiments"
           [syn: expressed, uttered, verbalized, verbalised]
    2: precisely and clearly expressed or readily observable;
       leaving nothing to implication; "explicit instructions"; "she
       made her wishes explicit"; "explicit sexual scenes" [syn:
       explicit, expressed] [ant: implicit, inexplicit]