tumbler

tum·bler

noun \ˈtəm-blər\

Definition of TUMBLER

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

Examples of TUMBLER

1. She drank a tumbler of water.
2. a gymnast who's a skillful tumbler

First Known Use of TUMBLER

14th century