Definition: deviating from normal expectations; somewhat odd, strange, or abnormal
Usage: these days large families are atypical; atypical clinical findings; atypical pneumonia; highly irregular behavior
Similar words: unnatural, abnormal
Definition: not normal; not typical or usual or regular or conforming to a norm
Usage: abnormal powers of concentration; abnormal amounts of rain; abnormal circumstances; an abnormal interest in food
Definition: not representative of a group, class, or type
Usage: a group that is atypical of the target audience; a class of atypical mosses; atypical behavior is not the accepted type of response that we expect from children
Similar words: unrepresentative
Definition: not exemplifying a class
Usage: I soon tumbled to the fact that my weekends were atypical; behavior quite unrepresentative (or atypical) of the profession