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1. The act of slowing down or falling behind
   - lag, retardation

1. Lose velocity; move more slowly
   "The car slowed down"
   - decelerate, slow, slow up, retard
    
2. Become slow or slower
   "Production slowed down"
   - slow, slow up, slack, slacken
    
3. Cause to proceed more slowly
   - slow, slow up
    
4. Reduce the speed of
   "He slowed down the car"
   - decelerate
    
5. Become less tense, rest, or take one's ease
   "He slowed down in the hot tub"
   - relax, loosen up, unbend, unwind, decompress

Derived forms: slowed down, slowdowns, slows down, slowing down

Type of: alter, change, change state, decrease, delay, diminish, fall, holdup, lessen, modify, turn, weaken

Encyclopedia: Slowdown