1. A glass with a flat bottom but no handle or stem; originally had a round bottom
   "He poured whiskey into a crystal tumbler"
    
2. A movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
   "The locksmith explained how the tumblers in the lock mechanism worked"
    
3. A gymnast who performs rolls and somersaults and twists etc.
   "The talented tumbler executed a perfect series of backflips"
    
4. Pigeon that executes backward somersaults in flight or on the ground
   "The tumbler pigeon amazed onlookers with its acrobatic flips";
   - roller, tumbler pigeon
    
5. [Brit] A clothes dryer that spins wet clothes inside a cylinder with heated air
   "She transferred the wet laundry to the tumbler";
   - tumble dryer, tumble drier [Brit]

Derived forms: tumblers

Type of: clothes drier, clothes dryer, domestic pigeon, drinking glass, glass, gymnast, impediment, impedimenta, obstructer, obstruction, obstructor

Part of: lock

Encyclopedia: Tumbler