TUMBLER

n. 1 a drinking-glass with no handle or foot (formerly with a rounded bottom so as not to stand upright). 2 an acrobat, esp. one performing somersaults. 3 (in full tumbler-drier) = tumble-drier. 4 a a pivoted piece in a lock that holds the bolt until lifted by a key. b a notched pivoted plate in a gunlock. 5 a kind of pigeon that turns over backwards in flight. 6 an electrical switch worked by pushing a small sprung lever. 7 a toy figure that rocks when touched. 8 = tumbling-barrel (see TUMBLE). tumblerful n. (pl. -fuls).