a short practice or a series of gentle exercises that you do to prepare yourself for doing a particular sport or activity （体育运动等前的）适应性活动，准备活动；热身练习 warm-up exercises 热身练习 He swam ten lengths of the pool as a warm-up. 他在游泳池里游了五个来回作为热身。
a short performance of music, comedy, etc. that is intended to prepare the audience for the main show 暖场表演（正式表演开始前上演的短小音乐、喜剧等节目） a warm-up act 暖场表演