Tumbler word meaning and definition

[noun] pigeon that executes backward somersaults in flight or on the ground
[noun] a glass with a flat bottom but no handle or stem; originally had a round bottom
[noun] a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
[noun] a gymnast who performs rolls and somersaults and twists etc.

\Tum"bler\, n. 1. One who tumbles; one who plays tricks by various motions of the body; an acrobat. 2. A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking. 3. (Firearms) A piece attached to, or forming part of, the hammer of a gunlock, upon which the mainspring acts and in which are the notches for sear point to enter. 4. A drinking glass, without a foot or stem; -- so called because originally it had a pointed or convex base, and could not be set down with any liquor in it, thus compelling the drinker to finish his measure. 5. (Zo["o]l.) A variety of the domestic pigeon remarkable for its habit of tumbling, or turning somersaults, during its flight. 6. (Zo["o]l.) A breed of dogs that tumble when pursuing game. They were formerly used in hunting rabbits. 7. A kind of cart; a tumbrel. [Prov. Eng. & Scot.]

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