(biology, psychology) An identifying characteristic, habit or trend.

plural of trait

A trait, at a lower level of biological organization, that acts together with other such traits to affect or determine characteristics at a higher level of biological organization.

An attribute of someone's personality.

plural of subordinate trait

(genetics) Any trait or characteristic whose appearance or absence in a person is determined by a gene on the sex chromosomes. Typically, these genes are found on the X chromosome but not on the Y chromosome.

plural of X-linked trait

restaurateur / (in modern France) A catering company

Traitorous.

To act the traitor toward; to betray; to deceive.