Donjon

//ˈdʌn.d͡ʒən// noun

Definitions

Noun
  1. 1
    The fortified tower and main residence of a motte or early castle; a keep.

    "It was a fortress of no great size, consisting of a donjon, or large and high square tower, surrounded by buildings of inferior height, which were encircled by an inner court-yard."

  2. 2
    the main tower within the walls of a medieval castle or fortress wordnet

Etymology

A variant of dungeon remodelled on its etymon, Old French donjon.

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