tum·bler 
/ˈtʌmblɚ/ noun
plural tum·blers /ˈtʌmblɚ/ noun [count] 1 a : a glass used for drinking that has a flat bottom and no stem or handle
▪ a water tumbler
b : the amount of liquid held in a tumbler
▪ She drank a tumbler of water. 2 : a person who performs athletic movements that involve rolling or turning along the ground or through the air
▪ circus tumblers [=acrobats] ▪ a gymnast who's a skillful tumbler
▪ a water tumbler
b : the amount of liquid held in a tumbler
▪ She drank a tumbler of water.
▪ circus tumblers [=acrobats] ▪ a gymnast who's a skillful tumbler
