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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 we like to keep them hungry, as they play a vital role in keeping down vermin.
The simulators could help the bobsledders learn particular courses while keeping down training costs.
This is critical to keeping down the overall development cost of consumer products, which is an important success factor in today's price-sensitive markets.
Representatives of the pest control industry say anticoagulant poisons are an effective means of keeping down the rat population, which represents a major health threat to humans, and they express skepticism that the mountain lions could have died from this cause.
You have demonstrated your dedication to servicing mortgages efficiently and to keeping down the costs of home ownership.
It will make a major contribution to keeping down council taxes until the late 2020s.