v. t. To shut up in a dungeon. Bp. Hall. [ 1913 Webster ]
n. [ OE. donjoun highest tower of a castle, tower, prison, F. donjon tower or platform in the midst of a castle, turret, or closet on the top of a house, a keep of a castle, LL. domnio, the same word as LL. dominus lord. See Dame, Don, and cf. Dominion, Domain, Demesne, Danger, Donjon. ] A close, dark prison, commonly, under ground, as if the lower apartments of the donjon or keep of a castle, these being used as prisons. [ 1913 Webster ]
Down with him even into the deep dungeon. Tyndale. [ 1913 Webster ]
Year after year he lay patiently in a dungeon. Macaulay. [ 1913 Webster ]