(noun) To act in such a way as to cause an offense to seem less serious.
Usage: Forgive me, and let the greatness and the purity of my love for you plead in extenuation of my act.
Definition:	(noun) To act in such a way as to cause an offense to seem less serious.
Usage:	Forgive me, and let the greatness and the purity of my love for you plead in extenuation of my act.
2. that he was deprived of the peace of mind by copy editors.