(noun, adjective)


1. not representative of a group, class, or type

- a class of atypical mosses

- atypical behavior is not the accepted type of response that we expect from children

Similar word(s): uncharacteristic, abnormal, unnatural, unrepresentative, atypic, untypical

2. deviating from normal expectations; somewhat odd, strange, or abnormal

- these days large families are atypical

- atypical clinical findings

- atypical pneumonia

Similar word(s): abnormal, unnatural, irregular


1. (pharmacy) An atypical antipsychotic.