- [usually before noun]
connected with the physical activity of sex 性行为的；性的 sexual behaviour/activity/desire 性行为/活动/欲望 sexual abuse/assault/violence 性侵犯/攻击/暴力 sexual acts/offences 性行为/罪行 They were not having a sexual relationship at the time. 当时他们之间并不存在性关系。 He denied having had sexual relations with her. 他否认与她有过性关系。 She engaged frequently in casual sexual encounters. 她经常进行随意的性接触。 The drop-in centres will provide a range of advice and support on sexual health. 救助中心将提供一系列关于性健康的建议和支持。 Her interest in him is purely sexual. 她对他感兴趣纯粹是因为性的原因。 sexual orientation/identity (= whether you are heterosexual, gay or bisexual) 性取向/身份 a sexual partner (= a person who you have sex with) 性伴侣 He has not threatened them, or made overtly sexual remarks. 他没有威胁他们，也没有公开发表性言论。
- [only before noun]
connected with the process of producing young 生殖的；有性繁殖的 - [usually before noun]
connected with the state of being male or female 性别的；性的 sexual characteristics 性别特征
Word Originmid 17th cent.: from late Latin sexualis, from Latin sexus ‘sex’.