| Testify 1. (v. i.) To make a solemn declaration, verbal or written, to establish some fact; to give testimony for the purpose of communicating to others a knowledge of something not known to them. 2. (v. i.) To make a solemn declaration under oath or affirmation, for the purpose of establishing, or making proof of, some fact to a court; to give testimony in a cause depending before a tribunal. 3. (v. i.) To declare a charge; to protest; to give information; to bear witness; -- with against. 4. (v. t.) To bear witness to; to support the truth of by testimony; to affirm or declare solemnly. 5. (v. t.) To affirm or declare under oath or affirmation before a tribunal, in order to prove some fact. 6. (adv.) In a testy manner; fretfully; peevishly; with petulance. Thesaurus Entries acknowledge, affirm, allege, announce, argue, assert, assert under oath, asseverate, assure, attest, aver, avouch, avow, be indicative of, be significant of, be symptomatic of, bear witness, bespeak, betoken, book, bring forward, call to witness, certify, characterize, connote, declare, demonstrate, denominate, denote, depone, depose, differentiate, disclose, display, entail, express, give evidence, give token, guarantee, highlight, hint, identify, indicate, involve, kiss the book, manifest, mark, mean, mount, note, point to, proclaim, prove, reveal, say, show, signify, stand for, state, suggest, swear, swear by bell, swear in, swear the truth, swear to, swear to God, swear to goodness, symptomatize, symptomize, take oath, vouch, vouchsafe, vow, warrant, witness |