Black's Law Dictionary (2nd edition)dictionaries

Testify

To bear wituess; to give evidence as a witness; to make a solemn declaration, under oath or affirmation, in a judicial inquiry, for the purpose of establishing or proving some fact See State v. Robertson, 26 S. C. 117, 1 S. E. 443; Gannon v. Stevens, 13 Kan. 459; Nash v. Hoxie, 59 Wis. 384, 18 N. W. 408; o’Brien v. State, 125 Ind. 38, 25 N. E. 137, 9 L. R. A. 323; Mudge v. Gilbert, 43 How. Prac. (N. Y.) 221

Source: Black's Law Dictionary 2nd Ed (1910)