WordWeb Online

1. Exercising in preparation for strenuous activity
   - warm-up, prolusion
    
2. Adjustments made to an engine to improve its performance

1. Adjust for (better) functioning
   "tune up the engine"
   - tune
    
2. Adjust the pitches of (musical instruments)
   "My piano needs to be tuned up"
   - tune

Derived forms: tuned up, tunes up, tune-ups, tuning up

Type of: adjust, adjustment, correct, preparation, readjustment, readying, registration, set

Encyclopedia: Tune up