Main Entry: tum·bler

Pronunciation: \ˈtəm-blər\

Function: noun

Date: 14th century

1 : one that tumbles: as a : one who performs tumbling feats : acrobat b : any of various domestic pigeons that tumble or somersault backward in flight or on the ground
2 : a drinking glass without foot or stem and originally with pointed or convex base
3 a : a movable obstruction in a lock (as a lever, latch, wheel, slide, or pin) that must be adjusted to a particular position (as by a key) before the bolt can be thrown b : a piece on which the mainspring acts in a gun's lock
4 : a device or mechanism for tumbling (as a revolving cage in which clothes are dried)
5 : a worker who operates a tumbler

— tum·bler·ful \-ˌfu̇l\ noun