1
2
: a drinking glass without foot or stem and originally with pointed or convex base
3
a
: a movable obstruction in a lock (such 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 (such as a revolving cage in which clothes are dried)
5
: a worker who operates a tumbler
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Merriam-Webster unabridged
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