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1. A decrease in rate of change
   "the slowing of the arms race";
   - deceleration, retardation

1. Lose velocity; move more slowly
   "The car slowed";
   - decelerate, slow down, slow up, retard
    
2. Become slow or slower
   "Production slowed";
   - slow down, slow up, slack, slacken
    
3. Cause to proceed more slowly
   "The illness slowed him down";
   - slow down, slow up

Derived forms: slowings

Type of: alteration, change, decrease, diminish, fall, lessen, modification, weaken

Antonym: acceleration

Encyclopedia: Slowing