城堡 meaning in English — castell, castle, chateau

English meaning

castell noun A human tower formed in festivals in Catalonia.
castle noun A large fortified building, historically home to a king or noble, built to withstand attack.
chateau name Clipping of Chateaubelair.
fort noun A strong structure built to defend a place, usually staffed with troops.

城堡 is used for these senses in English:

castell A human tower formed in festivals in Catalonia.
castle A large residential building or compound that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king. Also, a house or mansion with some of the architectural features of medieval castles.
château A French castle, fortress, manor house, or large country house.
forecastle (nautical) A raised part of the upper deck at the front of a ship; the structure of this part of the ship; the crew's quarters located within it.
fort A fortified defensive structure stationed with troops.

noun A large fortified building, historically home to a king or noble, built to withstand attack.
noun In chess, a rook, the piece shaped like a tower.
verb In chess, to make a special move where the king and a rook swap positions under certain conditions.