noun

1. A person or object that is not normal.

adjective

1. Not conforming to rule or system; deviating from the usual or normal type.

2. Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health.

Synonyms: aberrant, anomalous, atypical, exceptional, extraordinary, irregular, preternatural, strange