A small cylindrical object sometimes having a clamping attachment, around which hair is wound so as to produce curls; as, she slept all night with a head full of curlers.
an electrical appliance with a handle and a metal rod-shaped tip which is heated and around which hair is wound, to produce curls in the hair; -- called also curling iron.
a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it; "a woman with her head full of curlers is not a pretty sight"