The grammatical distinction of sex, expressed by a suffix, a prefix, or by a different word; instance of this.

【文法】性(以字首、字尾或另一字区别之)。

Sex.

性别。

Gender is a grammatical distinction, which may or may not be based on actual sex.

Gender 指文法中之性别而言，并不一定按实际性别分其性属：

Sex refers to characteristics of being male or female, and applies only to living organisms.

Sex 祇可用于生物，指雌雄的不同性征而言。