Толковый словарь английского языка Oxford English Reference - cage

n. & v. --n. 1 a structure of bars or wires, esp. for confining animals or birds. 2 any similar open framework, esp. an enclosed platform or lift in a mine or the compartment for passengers in a lift. 3 colloq. a camp for prisoners of war. --v.tr. place or keep in a cage. Phrases and idioms cage-bird a bird of the kind customarily kept in a cage. Etymology: ME f. OF f. L cavea