Testify word meaning and definition

[verb] give testimony in a court of law
[verb] provide evidence for; "The blood test showed that he was the father"; "Her behavior testified to her incompetence"

\Tes"ti*fy\, v. i. [imp. & p. p. {Testified}; p. pr. & vb. n. {Testifying}.] [OF. testifier, L. testificari; testis a witness + -ficare (in comp.) to make. See {-fy}, and cf. {Attest}, {Contest}, {Detest}, {Protest}, {Testament}.] 1. 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. 2. (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. 3. 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.
\Tes"ti*fy\, v. t. 1. 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. 2. (Law) To affirm or declare under oath or affirmation before a tribunal, in order to prove some fact.
\Tes"ti*fy\, adv. In a testy manner; fretfully; peevishly; with petulance.

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