tumbler

Noun
  1. A gymnast who performs rolls and somersaults and twists etc. (synset 110752624)
  2. A glass with a flat bottom but no handle or stem;
    Originally had a round bottom (synset 104504167)
  3. A movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown (synset 104504300)
  4. Pigeon that executes backward somersaults in flight or on the ground (synset 101817396)

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