Pronunciation: (mal-prak'tis), [key]
1. Law.failure of a professional person, as a physician or lawyer, to render proper services through reprehensible ignorance or negligence or through criminal intent, esp. when injury or loss follows.
2. any improper, negligent practice; misconduct or misuse.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.