1 a partner in a sexual relationship with sb who he/she is not married to （婚姻关系以外的）情人，爱人: He discovered that his wife had a lover. 他发现他的妻子有情人。The park was full of young lovers holding hands. 公园里到处都是手挽着手的年轻情侣。

2 a person who likes or enjoys the thing mentioned （某事物的）爱好者，热爱者: a music lover 音乐爱好者an animal lover 动物爱好者