\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.