1. A cylinder that revolves
   "The printing press used large rollers to apply ink evenly"
    
2. A small wheel without spokes (as on a roller skate)
   "One of the rollers on her skate had come loose"
    
3. A mechanical device consisting of a cylindrical tube around which the hair is wound to curl it
   "a woman with her head full of rollers is not a pretty sight";
   - curler, hair curler, crimper
    
4. A long heavy sea wave as it advances towards the shore
   "Surfers waited for the perfect roller";
   - roll, rolling wave
    
5. A grounder that rolls along the infield
   "The shortstop easily fielded the roller and threw to first for the out"
    
6. Old World bird that tumbles or rolls in flight; related to kingfishers
   "The roller performed acrobatic manoeuvres in the air"
    
7. Pigeon that executes backward somersaults in flight or on the ground
   "The roller pigeon amazed onlookers with its acrobatic flips";
   - tumbler, tumbler pigeon

Derived forms: rollers

Type of: coraciiform bird, cylinder, domestic pigeon, ground ball, groundball, grounder, hopper, mechanical device, moving ridge, wave, wheel

Part of: Coraciidae, family Coraciidae, roller blind, roller skate

Encyclopedia: Roller, Joseph