1. improper conduct; wrong behavior.
2. unlawful conduct by an official in regard to his or her office, or by a person in the administration of justice, such as a lawyer, witness, or juror; malfeasance.
1. to mismanage.
2. to misbehave (oneself).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.