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Architecture the main tower within the walls of a medieval castle or fortress


Inner tower of a castle.

keep, donjon

The stronghold of a medieval castle, usually in the form of a massive tower, and a place of residence, esp. in times of siege.
References in periodicals archive ?
But when she tried on a titfer he struggled to keep a stiff upper lip.
Sure, it must have been hard to keep a stiff upper lip Saturday in the darkening afternoon sky as the Mustangs scored five unanswered touchdowns.
A diplomatic incident in Dublin yesterday left British Embassy staff struggling to keep a stiff upper lip.