名詞 deviant:

1. a person whose behavior deviates from what is acceptable especially in sexual behavior
   同義詞：pervert, deviate, degenerate

形容詞 deviant:

1. markedly different from an accepted norm
   同義詞：aberrant, deviate

1. Not typical, usual, or regular; not normal; deviant.
   反常的，異常的非一般的、不平常的或非慣例的; 不正常的; 反常的

de.vi.ant

adj.（形容詞）
Differing from a norm or from the accepted standards of a society.
偏離，脫離：不正常的或脫離社會常軌的
n.（名詞）
One that differs from a norm, especially a person whose behavior and attitudes differ from accepted social standards.
不正常的人：指不正常的人，特別是行為和處世態(tài)度脫離社會常軌的人

來源：
Middle English deviaunt
中古英語 deviaunt
from Late Latin dôvi3ns dôviant- [present participle of] dôvi3re [to deviate] * see deviate
源自 后期拉丁語 dôvi3ns dôviant- [] dôvi3re的現(xiàn)在分詞 [背離] *參見 deviate

【引伸】
de.viance 或
de.viancy
n.（名詞）