Breadcrumb Home > Dictionary > Index A affidavit: Meaning and Definition of Find definitions for: af•fi•da•vit Pronunciation: (af"i-dā'vit), [key] — n. Law. a written declaration upon oath made before an authorized official. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: affidavit (Thesaurus) afficionado affiliate ✖ Related Content Daily Word Quiz: antebellum Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language