1590s, "act of opening up to view, a making known or revealing;" see disclose + -ure. Formed in English, perhaps on model of closure. Meaning "that which is disclosed or made known" is by 1825.
Entries linking to disclosure
disclose v.
late 14c., disclosen, "to uncover and expose to view, open to the knowledge of others," from Old French desclos "open, exposed, plain, explicit," past participle of desclore (Modern French déclore) "open, break open, unlock, reveal," from des- "opposite of" (see dis-) + clore "to close" (see close (v.)). Related: Disclosed; disclosing.
-ure
suffix forming abstract nouns of action, from Old French -ure, from Latin -ura, an ending of fem. nouns denoting employment or result.
closure n.
late 14c., "a barrier, a fence," from Old French closure "enclosure; that which encloses, fastening, hedge, wall, fence," also closture "barrier, division; enclosure, hedge, fence, wall" (12c., Modern French clôture), from Late Latin clausura "lock, fortress, a closing" (source of Italian chiusura), from past participle stem of Latin claudere "to close" (see close (v.)).
Sense of "act of closing, a bringing to a close" is from early 15c. In legislation, especially "closing or stopping of debate" (compare cloture). Sense of "tendency to create ordered and satisfying wholes" is 1924, from Gestalt psychology.