[roll.er] n (13c) 1 a: a revolving cylinder over or on which something is moved or which is used to press, shape, spread, or smooth something b: a cylinder or rod on which something (as a shade) is rolled up
2. a: a long heavy ocean wave b: a tumbler pigeon
3: one that rolls or performs a rolling operation
4: a slowly rolling ground ball
[2]rol.ler n [G, fr. rollen to roll, reverberate, fr. MF roller--more at roll] (1678) 1: any of numerous mostly brightly colored nonpasserine Old World birds (family Coraciidae) that perform rolling aerial dives during courtship displays
2: a canary having a song in which the notes are soft and run together