checker

Multiple Entries:
  checker    chequer  

Concise Oxford English Dictionary © 2008 Oxford University Press:
checker1

▶noun

• 1 a person or thing that checks.

• 2 US a cashier in a supermarket.

Concise Oxford English Dictionary © 2008 Oxford University Press:
checker2

▶noun & verb US spelling of chequer.

Concise Oxford English Dictionary © 2008 Oxford University Press:
chequer /ˈtʃɛkə/ (US checker)

▶noun

• 1 (chequers) a pattern of alternately coloured squares.

• 2 (checkers) [treated as sing.] N. Amer. the game of draughts.

  ■ (checker) a piece used in this game.

▶verb

• 1 divide into or mark with chequers.

• 2 (as adj. chequered) marked by periods of fluctuating fortune: a chequered career.

– origin ME (in the sense ‘chessboard’, giving rise to chequered meaning ‘marked like a chessboard’): from exchequer.