n.
Function: verb
Inflected Form: cas · tled ; cas · tling \ ' ka-s( ə -)li ŋ \
Date: 1587
transitive verb
1 : to establish in a castle
2 : to move (the chess king) in castling
intransitive verb : to move a chess king two squares toward a rook and in the same move the rook to the square next past the king