Not-guilty meaning : 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.