(a) To assert (that sth. is the case, sth. is so), aver; also, affirm (a fact) formally or under oath, testify to the truth of; also, in parenthetical constructions: assert, testify [quots. a1420 & c1426]; (b) to provide confirmation or corroboration [quots. ?a1475 & last]; support (a story, generalization, book, etc.) with evidence or confirmatory detail, give credence to, corroborate; supply evidence for (a proposition), imply; also, ?strengthen or confirm (someone’s faith) [quot. a1500(a1415)]; (c) to prove (an opinion, a proposition) true, substantiate, demonstrate; also, ?reinforce (an element in a classification scheme) [quot. c1475(c1445)]; (d) to affirm the reality or genuineness of (sth.); authenticate (the relics of a saint); authoritatively state the truth of (sth.); ben verifiede, be or be shown to be real, really existent, or genuine, be established; also, of an angel [1st quot.]: ?be assured a particular state of blessedness, be secure; ?be confirmed as truthful.

To bear out (an assertion, a principle, proverb, etc.), confirm by reality, realize; conform to (a generalization or description), exemplify; also, fulfill (a prophecy).

(a) To discover, learn, or investigate (the truth); (b) ben wel verified, ?to be well informed (about sth.).