castling castlewise • castock · · · Info · Definitions · Synonyms · Characters · · castling · · Text Latin · · Script 8 · · Length Definitions · · · (noun) interchanging the positions of the king and a rook. Synonyms: castle. · · Noun Definition 1 (verb) move the king two squares toward a rook and in the same move the rook to the square next past the king. Synonyms: castle. · · Verb Definition 1 Synonyms · · · castle · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074