Etymology
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roller (n.)

late 13c., "thing that rolls, roller for moving heavy objects;" late 14c., "a rolling pin," agent noun from roll (v.). The sense of "heavy cylinder for smoothing the ground is from 1520s.

Meaning "hair-curler" is attested from 1795; as a printer's tool, by 1790; as a device for applying paint, etc. to a flat surface, by 1955. The meaning "long, heavy, swelling wave" is by 1829. In combinations, it often means "done on or by means of roller-skates," for example roller derby (by 1936; see derby); roller hockey (1926); roller-disco (1978). Disparaging religious term holy roller is attested from 1842, American English, from the alleged rolling in the church aisles done by those in the Spirit.

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Definitions of roller

roller (n.)
a grounder that rolls along the infield;
roller (n.)
a long heavy sea wave as it advances towards the shore;
Synonyms: roll / rolling wave
roller (n.)
a small wheel without spokes (as on a roller skate);
roller (n.)
a cylinder that revolves;
roller (n.)
a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it;
Synonyms: curler / hair curler / crimper
roller (n.)
Old World bird that tumbles or rolls in flight; related to kingfishers;
roller (n.)
pigeon that executes backward somersaults in flight or on the ground;
Synonyms: tumbler / tumbler pigeon
From wordnet.princeton.edu