Definition of: checker

(chek′ər) noun
1. A piece in the game of checkers, usually a small disk.
2. One of the squares in a checkered surface.
3. plural A game for two persons played with 24 pieces upon a checkerboard; draughts.
4. One who checks; especially, one who inspects, counts, or supervises the disposal of merchandise, as in a market.
5. The cultivated service tree.
6. The wild European service tree (S. torninalis): also called checkertree.
7. The fruit of either tree.
—v.t.
1. To mark with squares or crossed lines.
2. To mark with vicissitudes; diversify. Also Brit. chequer. [<OF eschequier chessboard <Med. L scaccarium <scacci chess <Arabic shāq. See CHECK.]