checker

/ˈtʃɛkər/
noun
  1. A person who examines or inspects something for accuracy, quality, or correctness.
    • The ticket checker at the gate scanned our passes.
    • The quality checker at the factory rejected the defective parts.
    • A spelling checker can help you find typos in your writing.
  2. One of the round pieces used in the board game checkers.
    • The red checker jumped over the black one.
    • She lost three checkers early in the game.
    • He moved his checker forward to capture the opponent's piece.
What does "checker" mean? | whatsthatwordmean | whatsthatwordmean