'Castling' definitions:

Definition of 'castling'

From: WordNet
noun
Interchanging the positions of the king and a rook [syn: castle, castling]

Definition of 'Castling'

From: GCIDE
  • Castling \Cast"ling\, n. That which is cast or brought forth prematurely; an abortion. --Sir T. Browne. [1913 Webster]

Definition of 'Castling'

From: GCIDE
  • Castling \Cas"tling\, n. (Chess) A compound move of the king and castle. See Castle, v. i. [1913 Webster]

Definition of 'Castling'

From: GCIDE
  • Castle \Cas"tle\, v. i. [imp. & p. p. Castled; p. pr. & vb. n. Castling.] (Chess) To move the castle to the square next to king, and then the king around the castle to the square next beyond it, for the purpose of covering the king. [1913 Webster]