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1. Exercising in preparation for strenuous activity
   - tune-up, prolusion

1. Run until the normal working temperature is reached
   "We warmed up the car for a few minutes"
    
2. Become more friendly or open
   "She warmed up after we had lunch together"
    
3. Get warm or warmer
   - warm
    
4. Cause to do preliminary exercises so as to stretch the muscles
   "The coach warmed up the players before the game"
    
5. Make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
   - limber up, loosen up

Derived forms: warmed up, warms up, warming up, warm-ups

Type of: change, exercise, operate, preparation, put to work, readying, run, work, work out

Encyclopedia: Warm up