The Collaborative International Dictionary of English v.0.48:

Exhibition \Ex`hi*bi"tion\, n. [L. exhibitio a delivering: cf.
   F. exhibition.]
   1. The act of exhibiting for inspection, or of holding forth
      to view; manifestation; display.
      [1913 Webster]

   2. That which is exhibited, held forth, or displayed; also,
      any public show; a display of works of art, or of feats of
      skill, or of oratorical or dramatic ability; as, an
      exhibition of animals; an exhibition of pictures, statues,
      etc.; an industrial exhibition.
      [1913 Webster]

   3. Sustenance; maintenance; allowance, esp. for meat and
      drink; pension. Specifically: (Eng. Univ.) Private
      benefaction for the maintenance of scholars.
      [1913 Webster]

            What maintenance he from his friends receives,
            Like exhibition thou shalt have from me. --Shak.
      [1913 Webster]

            I have given more exhibitions to scholars, in my
            days, than to the priests.            --Tyndale.
      [1913 Webster]

   4. (Med.) The act of administering a remedy.
      [1913 Webster]

WordNet (r) 3.0 (2006):

exhibition
    n 1: the act of exhibiting; "a remarkable exhibition of
         musicianship"
    2: a collection of things (goods or works of art etc.) for
       public display [syn: exhibition, exposition, expo]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "exhibition":
   benefit, bill, blazon, bravura, brilliancy, cosmorama, cyclorama,
   daring, dash, debut, demo, demonstration, diorama, display,
   dramatics, eclat, enactment, entertainment, etalage, exhibit,
   exhibitionism, expo, exposition, exposure, fair, false front,
   fanfaronade, farewell performance, figure, flair, flaunt,
   flaunting, flesh show, flourish, georama, histrionics, light show,
   manifestation, myriorama, offering, opening, ostentation, pageant,
   pageantry, panorama, parade, performance, phantasmagoria, pomp,
   premiere, presentation, presentment, production, projection,
   psychedelic show, representation, retrospective, sham,
   shifting scene, show, showing, showing-off, sight, spectacle,
   splash, splurge, stage presentation, stage show, staginess,
   swan song, tableau, tableau vivant, theatrical performance,
   theatrics, tryout, unfolding, unfoldment, unveiling,
   varnishing day, vaunt, vernissage



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

EXHIBITION, Scotch law. An action for compelling the production of writings.
In Pennsylvania, a party possessing writings is compelled, to produce them
on proper notice being given, in default of which judgment is rendered
against him.