The Collaborative International Dictionary of English v.0.48:

Disclosure \Dis*clo"sure\ (?; 135), n. [See Disclose, v. t.,
   and cf. Closure.]
   1. The act of disclosing, uncovering, or revealing; bringing
      to light; exposure.
      [1913 Webster]

            He feels it [his secret] beating at his heart,
            rising to his throat, and demanding disclosure. --D.
                                                  Webster.
      [1913 Webster]

   2. That which is disclosed or revealed.
      [1913 Webster]

            Were the disclosures of 1695 forgotten? --Macaulay.
      [1913 Webster]

WordNet (r) 3.0 (2006):

disclosure
    n 1: the speech act of making something evident [syn:
         disclosure, revelation, revealing]

Moby Thesaurus II by Grady Ward, 1.0:

130 Moby Thesaurus words for "disclosure":
   Christophany, Satanophany, admission, affidavit, affirmation,
   allegation, angelophany, announcement, apparition, appearance,
   appearing, arising, assertion, asseveration, attest, attestation,
   avatar, averment, avouchment, avowal, bringing to light,
   casual discovery, catching, chance discovery, characterization,
   coming, coming into being, coming-forth, compurgation, conveyance,
   declaration, denomination, denotation, deposition, designation,
   detection, determination, determining, differentiation, discovery,
   dissemination, distinguishment, embodiment, emergence, epiphany,
   espial, evidence, evincement, excavation, exhumation, exposure,
   expression, find, finding, finding out, fingering, forthcoming,
   giving, hint, identification, impartation, imparting, impartment,
   incarnation, indication, indicativeness, instrument in proof,
   invention, issuance, legal evidence, locating, location,
   lucky strike, manifestation, materialization, materializing,
   meaning, naming, notification, occurrence, opening, picking out,
   pneumatophany, pointing, pointing out, pointing to, presentation,
   profession, proof, publication, realization, recognition,
   rediscovery, revelation, rise, rising, selection, serendipity,
   sharing, show, showing, showing forth, signification,
   specification, spotting, statement, strike, suggestion,
   sworn evidence, sworn statement, sworn testimony, symptomaticness,
   telling, testimonial, testimonium, testimony, theophany, transfer,
   transference, transmission, transmittal, treasure trove,
   trouvaille, trove, uncovering, unearthing, unfolding, unfoldment,
   witness, word