verb
1.
to serve as evidence of
present conditions testify to the accuracy of his predictions
Synonyms: attest, point (to)
Related Word: affirm; demonstrate, show; prove
Contrasted words: discredit, disprove, invalidate; confute, refute
2.
to make a solemn declaration under oath for the purpose of establishing a fact (as in court)
testified against the defendant
Synonyms: depone, depose, ||mount, swear
Idioms: give testimony
3.
Synonyms: indicate 2, announce, argue, attest, bespeak, betoken, witness