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1. The act of accelerating; increasing the speed
   - acceleration, quickening

1. Move faster
   "The car sped up"
   - accelerate, speed, quicken
    
2. Cause to move faster
   "He sped up the car"
   - accelerate, speed
    
3. Cause to occur rapidly
   - induce, stimulate, rush, hasten, accelerate

Derived forms: speeded up, speeding up, speeds up, speedups, sped up

See also: speed

Type of: alter, change, deepen, effect, effectuate, hurrying, intensify, modify, set up, speed, speeding

Encyclopedia: Speed up