A period or act of preparation for a performance, game, or exercise session, involving gentle exercise or practice. The team gathered on the field for a quick warm-up before the match started.
An event or activity that precedes a more important one, serving as a preparation or introduction. The concert began with a warm-up act that got the audience excited for the main performance.
Warm, comfortable clothing, especially a sweatsuit, worn during exercise or as casual wear (usually in the plural). He threw on his warm-ups and headed to the gym.