Tumbler/ˈtʌmblər/ Definition 1 of 6Pro Tip 1/2Drinkware Category Tumbler refers to a style of drinkware, often used casually. He drank lemonade from a plastic tumbler at the picnic. Pro Tip 2/2Not for Alcohol Tumblers aren't typically used for alcoholic drinks that require a stem. He poured the whiskey into a tumbler, not a wine glass.