I. roll·er ˈrō-lər noun
Date: 13th century
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. : tumbler 1b
3. : one that rolls or performs a rolling operation
4. : a slowly rolling ground ball
II. rol·ler ˈrō-lər noun
Etymology: German, from rollen to roll, reverberate, from Middle French roller — more at roll
Date: 1678
1. : any of various 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