testify Meaning, Definition & Usage

verb give testimony in a court of law
bear witness; attest; take the stand.
verb provide evidence for
show; evidence; bear witness; prove.
- The blood test showed that he was the father
- Her behavior testified to her incompetence

OF. testifier, L. testificari; testis a witness + -ficare (in comp.) to make. See -fy, and cf. Attest, Contest, Detest, Protest, Testament.

imperfect & past participle Testified ; present participle & verbal noun Testifying

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.
Jesus . . . needed not that any should testify of man, for he knew what was in man. John ii. 25.
(Law) 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.
One witness shall not testify against any person to cause him to die. Num. xxxv. 30.
To declare a charge; to protest; to give information; to bear witness; -- with against.
O Israel, . . . I will testify against thee. Ps. l. 7.

I testified against them in the day wherein they sold victuals. Neh. xiii. 15.

To bear witness to; to support the truth of by testimony; to affirm or declare solemny.
We speak that we do know, and testify that we have seen; and ye receive not our witness. John iii. 11.
(Law) To affirm or declare under oath or affirmation before a tribunal, in order to prove some fact.