checkers

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun plural A game played on a checkerboard by two players, each using 12 pieces that can move diagonally, with the object being to capture and remove all of the opponent's pieces. A piece is captured after an opponent's piece moves over it to an open space.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural A game, called also draughts, played on a checkerboard by two persons, each having twelve men (counters or checkers) which are moved diagonally. The game is ended when either of the players has lost all his men, or can not move them.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun board games, US, singular A game for two players played on a chessboard; the players have 12 pieces each, and the object is to capture all the opponent’s pieces by jumping over them. Other European varieties have larger boards and more playing pieces.
• noun Plural form of checker.
• noun board games, US, plural the playing pieces in the game of checkers.
• verb Third-person singular simple present indicative form of checker.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a checkerboard game for two players who each have 12 pieces; the object is to jump over and so capture the opponent's pieces