side·line¹/`saɪdˏlaɪn; ˈsaɪdlaɪn/ n 1 [C] something that you do to earn money in addition to your regular job 副业，兼职: Mark does translation work as a sideline. 马克兼职做点翻译工作。 2 on the sidelines not taking part in an activity that other people are involved in 旁观: There are still buyers on the sidelines waiting to get stocks. 还有持旁观态度的买家在等着想进货。 3 the sidelines the area around the edges of a sports field 〔球场的〕界外区域