vt one who checks.
2. checker ·vt checkerwork.
3. checker ·vt a pattern in checks; a single check.
4. checker ·vt a piece in the game of draughts or checkers.
5. checker ·noun to mark with small squares like a checkerboard, as by crossing stripes of different colors.
6. checker ·noun to variegate or diversify with different qualities, colors, scenes, or events; ·esp., to subject to frequent alternations of prosperity and adversity.