1. Having or resembling repeated square indentations like those in a battlement
   "The castled roofline of the medieval fortress was visible from miles away";
   - embattled, battlemented, castellated, crenelated
    
2. (chess) having performed castling; positioned after castling
   "The castled king was well protected behind its pawns"
    
3. Having or defended by castles; fortified with castles
   "The castled hilltops dominated the medieval landscape"

1. (chess) move the king two squares toward a rook and in the same move the rook to the square next past the king
   "He castled early in the game to protect his king"

See also: fancy

Type of: go, move

Encyclopedia: Castle, Newcastle upon Tyne