1 [U] the state of being either male or female 性别:
Applications are welcome from anyone, regardless of sex or race.欢迎任何人申请,不论性别、种族。Do you mind what sex your baby is?你想生男还是生女? [SYN] gender 同义词为gender
2 [C] one of the two groups consisting of all male people or all female people 男性;女性:
the male/female sex男性;女性He's always found it difficult to get on with the opposite sex (= women).他总觉得难以和异性相处。
3 (formal 正式coitusintercoursesexual intercourse) [U] the physical act in which the sexual organs of two people touch and which can result in a woman having a baby 性交:
to have sex with somebody与某人性交sex education in schools学校的性教育