Meaning

noun a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)

verb lock up or confine, in or as in a jail

originFrom Middle English gayole, gaiol, gaylle, gaille, gayle, gaile, via Old French gaiole, gayolle, gaole, from Medieval Latin gabiola, for Late Latin caveola, a diminutive of Latin cavea (“cavity, coop, cage”). See also cage.

Etymology from Wiktionary, CC BY-SA 3.0