n. Someone who does wrong, either morally, ethically or in contravention of a law
the GNU version of the Collaborative International Dictionary of English
n. One who injures another, or who does wrong.
n. One who commits a tort or trespass; a trespasser; a tort feasor.
The Century Dictionary and Cyclopedia
n. One who does wrong, or commits wrongful or reprehensible acts; any offender against the moral law.
n. In law, one who commits a tort or trespass; a tort-feaser.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a person who transgresses moral or civil law
Word Usage
"A wrongdoer is not legally obliged to make a public confession, or to alert people who may have claims against it, to get the benefit of a statute of limitations."