1. Speed up
   "let's rev up production"
   - step up 
2. Increase the number of rotations per minute
   "rev up an engine"
   - rev

Derived forms: revs up, revved up, revving up

Type of: increase

• birdcage mask
• birdcall
• birder
• birdfeeder
• birdhouse
• birdie
• birdlike
• birdlime
• birdnest
• birdnesting
• birdseed
• birdseed grass
• birdsong
• birdwatch
• birefringence
• birefringent
• bireme
• biretta
• biriani
• birken
• birl
• birle
• birling
• Birmingham
• Biro