Webster's Revised Unabridged Dictionary · 1913

Checker

Checker (chek"ẽr) , noun

[From Check, transitive verb]

One who checks.

Checker (chek"ẽr) , transitive verb

[From Old French eschequier a chessboard, French échiquier. See Check, n., and compare 3d Checker.]

1.
To mark with small squares like a checkerboard, as by crossing stripes of different colors.
2.
To variegate or diversify with different qualities, colors, scenes, or events; esp., to subject to frequent alternations of prosperity and adversity.
Our minds are, as it were, checkered with truth and falsehood. — Addison

Checker , noun

[Old French eschequier. See Checker, transitive verb]

1.
A piece in the game of draughts or checkers.
2.
A pattern in checks; a single check.
3.
Checkerwork.

This word is also written chequer.