1. a drinking glass with straight sides and no handle
2. a person who performs acrobatic movements such as somersaults
3. a part of a lock mechanism that must be moved to a particular position by a key
Usage: technical

Examples

• She poured water into a glass tumbler.
• The tumbler held eight ounces of juice.
• The circus tumbler performed amazing flips and rolls.
• Young tumblers practiced their routines on the mat.
• The locksmith explained how the tumblers work inside the lock.
• Each tumbler must align perfectly for the key to turn.
• The tumbler pigeons delighted spectators with their aerial acrobatics.