Definitions for: Atypical

[adj] not conforming to type; "showed atypical agility"
[adj] deviating from what is usual or common or to be expected; often somewhat odd or strange; "these days large families are atypical"; "highly irregular behavior"
[adj] deviating from or not conforming to type; "atypical behavior..not the accepted type of response that we expect from children"- G.E.Gardner