What is the meaning of Not_guilty?

A formal plea by a defendant of not being culpable for the crime with which the defendant is charged.

A verdict or formal finding by the legal system that a defendant is not culpable for the crime with which the defendant was charged.

A member of a jury or tribunal supporting acquittal, or a vote cast in support of acquittal.

A person who has been acquitted of a crime.

Of a person, legally innocent of a crime which they have been accused of in a court of law.

Innocent.

Source: wiktionary.org