tumbler

Meanings

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

Synonyms

roller, tumbler pigeon