ab·er·rant [uh-ber-uhnt, ab-er-]
1. departing from the right, normal, or usual course.
2. deviating from the ordinary, usual, or normal type; exceptional; abnormal.
3. an aberrant person, thing, group, etc.
1820–30; < Latin aberrant- (stem of aberrāns, present participle of aberrāre to deviate). See ab-, errant
World English Dictionary
1. deviating from the normal or usual type, as certain animals from the group in which they are classified
2. behaving in an abnormal or untypical way
3. deviating from truth, morality, etc
aberrant ab·er·rant (ā-běr'ənt, āb'ər-) adj.
Deviating from the usual course, as certain ducts, vessels, or nerves.
Deviating from the normal; untrue to type.
Out of place; ectopic.