The Collaborative International Dictionary of English v.0.48:

Expose \Ex*pose"\, v. t. [imp. & p. p. Exposed; p. pr. & vb.
   n. Exposing.] [F. exposer; pref. ex- (L. ex out)+poser to
   place. See Pose, v. t.]
   1. To set forth; to set out to public view; to exhibit; to
      show; to display; as, to expose goods for sale; to expose
      pictures to public inspection.
      [1913 Webster]

            Those who seek truth only, freely expose their
            principles to the test, and are pleased to have them
            examined.                             --Locke.
      [1913 Webster]

   2. To lay bare; to lay open to attack, danger, or anything
      objectionable; to render accessible to anything which may
      affect, especially detrimentally; to make liable; as, to
      expose one's self to the heat of the sun, or to cold,
      insult, danger, or ridicule; to expose an army to
      destruction or defeat.
      [1913 Webster]

            Expose thyself to feel what wretches feel. --Shak.
      [1913 Webster]

   3. To deprive of concealment; to discover; to lay open to
      public inspection, or bring to public notice, as a thing
      that shuns publicity, something criminal, shameful, or the
      like; as, to expose the faults of a neighbor.
      [1913 Webster]

            You only expose the follies of men, without
            arraigning their vices.               --Dryden.
      [1913 Webster]

   4. To disclose the faults or reprehensible practices of; to
      lay open to general condemnation or contempt by making
      public the character or arts of; as, to expose a cheat,
      liar, or hypocrite.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Expos'e \Ex`po`s['e]"\, n. [F., prop. p. p. of exposer. See
   Expose, v. t.]
   A formal recital or exposition of facts; exposure, or
   revelation, of something which some one wished to keep
   concealed.
   [1913 Webster]

WordNet (r) 3.0 (2006):

expose
    n 1: the exposure of an impostor or a fraud; "he published an
         expose of the graft and corruption in city government"
         [syn: expose, unmasking]
    v 1: expose or make accessible to some action or influence;
         "Expose your students to art"; "expose the blanket to
         sunshine"
    2: make known to the public information that was previously
       known only to a few people or that was meant to be kept a
       secret; "The auction house would not disclose the price at
       which the van Gogh had sold"; "The actress won't reveal how
       old she is"; "bring out the truth"; "he broke the news to
       her"; "unwrap the evidence in the murder case" [syn:
       unwrap, disclose, let on, bring out, reveal,
       discover, expose, divulge, break, give away, let
       out]
    3: to show, make visible or apparent; "The Metropolitan Museum
       is exhibiting Goya's works this month"; "Why don't you show
       your nice legs and wear shorter skirts?"; "National leaders
       will have to display the highest skills of statesmanship"
       [syn: expose, exhibit, display]
    4: remove all or part of one's clothes to show one's body;
       "uncover your belly"; "The man exposed himself in the subway"
       [syn: uncover, expose] [ant: cover]
    5: disclose to view as by removing a cover; "The curtain rose to
       disclose a stunning set" [syn: disclose, expose]
    6: put in a dangerous, disadvantageous, or difficult position
       [syn: queer, expose, scupper, endanger, peril]
    7: expose to light, of photographic film
    8: expose while ridiculing; especially of pretentious or false
       claims and ideas; "The physicist debunked the psychic's
       claims" [syn: debunk, expose]
    9: abandon by leaving out in the open air; "The infant was
       exposed by the teenage mother"; "After Christmas, many pets
       get abandoned"