Plea in Bar Law and Legal Definition

Plea in bar is a pleading introduced by the defendant in an action as a complete defense, designed to defeat the action for all time. A plea by an accused in a criminal case, asserting any matter in confession and avoidance not admissible under the plea of not guilty is a plea in bar.

In the common law plea in bar is a plea that set out special reasons for which a trial cannot go ahead. They are the plea of autrefois convict, the plea of autrefois acquit, and the plea of pardon.