Definitions
1.nounA large building that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king.
2.nounAn instance of castling.
3.nounA rook; a chess piece shaped like a castle tower.
4.nounA defense structure in shogi formed by defensive pieces surrounding the king.
5.nounA close helmet.
6.nounAny strong, imposing, and stately mansion.
7.nounA small tower, as on a ship, or an elephant's back.
8.nounThe wicket.
9.verbTo house or keep in a castle.
10.verbTo protect or separate in a similar way.
11.verbTo make into a castle: to build in the form of a castle or add (real or imitation) battlements to an existing building.
12.verb(usually intransitive) To move the king 2 squares right or left and, in the same turn, the nearest rook to the far side of the king. The move now has special rules: the king cannot be in, go through, or end in check; the squares between the king and rook must be vacant; and neither piece may have been moved before castling.
13.verb(usually intransitive) To create a similar defensive position in Japanese chess through several moves.
14.verbTo bowl a batsman with a full-length ball or yorker such that the stumps are knocked over.