Definitions of roller:

• noun:   a grounder that rolls along the infield
• noun:   pigeon that executes backward somersaults in flight or on the ground
• noun:   Old World bird that tumbles or rolls in flight; related to kingfishers
• noun:   a cylinder that revolves
• noun:   a small wheel without spokes (as on a roller skate)
• noun:   a long heavy sea wave as it advances towards the shore
• noun:   a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it
• name:  A surname (rare: 1 in 33333 families; popularity rank in the U.S.: #4168)