Testify \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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Testify \Tes"ti*fy\, adv. In a testy manner; fretfully; peevishly; with petulance.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Testify \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.

Source: Webster's Revised Unabridged Dictionary (1913)