checker UK /ˈtʃɛkə/US /ˈt͡ʃɛkɚ/noun 8verb 2forms 3 noun8 •A playing piece in the game of checkers (British: draughts), or certain other table games such as backgammon. •The clerk who tallies cost of purchases and accepts payment.There was a long line at the grocery store because the checker was so slow. •One who or that which checks or verifies something.So, keep in mind that Microsoft Word’s Spelling tool is as much a “typo” tool as a checker of spelling. — 1992 •A pattern of alternating colours as on a chessboard. •An individual square appearing in such a pattern. •One who makes a check mark."Essentially," said a senior vice president of the FHLBB of Dallas, "we were checkers of boxes." — 1989 •One who hinders or stops something. •The fruit of the wild service tree or chequer tree, Photinia villosa, syn. Sorbus terminalis verb2 •To mark in a pattern of alternating light and dark positions, like a checkerboard. •To develop markings in a pattern of alternating light and dark positions, like a checkerboard. formscheckered · checkering · checkers