Meaning of king's-pawn openings

king's'-pawn' o"penings

Pronunciation: (kingz'pôn'), [key]
— (used with a sing. v.) (used with a sing. v.)
  1. a class of chess openings in which the pawn in front of the king is advanced two squares on the first move.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.