n.
1.a large and stately mansion
2.a large building formerly occupied by a ruler and fortified against attack
3.(chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard
4.interchanging the positions of the king and a rook castle v.
1.move the king two squares toward a rook and in the same move the rook to the square next past the king
Idiom of the Day
would give one's right arm (for something)
to be willing to give something valuable for something
I would give my right arm to meet my favorite musician.