TEST'IFY, verb intransitive [Latin testificor; testis and facio.]

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 2:25.

2. In judicial proceedings, to make a solemn declaration under oath, for the purpose of establishing or making proof of some act 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. Numbers 35:30.

3. To declare a charge against one.

O Israel, I will testify against thee. Psalms 1:1.

4. To protest; to declare against.

I testified against them in the day wherein they sold victuals. Nehemiah 13:1.

TEST'IFY, verb transitive To affirm or declare solemnly for the purpose of establishing a fact.

We speak that we do know, and testify that we have seen. John 3:11.

1. In law, to affirm or declare under oath before tribunal, for the purpose of proving some fact.

2. To bear witness to; to support the truth of by testimony.

To testify the gospel of the grace of God. Acts 20:24.

3. To publish and declare freely.

Testifying both to the Jews, and also to the Greeks, repentance towards God and faith towards our Lord Jesus Christ. Acts 20:24.