checker

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.

One who makes a check mark.

• "Essentially," said a senior vice president of the FHLBB of Dallas, "we were checkers of boxes."

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 hinders or stops something.

A playing piece in the game of checkers (British: draughts), or certain other table games such as backgammon.

A pattern of alternating colours as on a chessboard.

An individual square appearing in such a pattern.

To mark in a pattern of alternating light and dark positions, like a checkerboard.transitive

• On the other hand, who ever tires of the names of Oldfield, and Bracegirdle, and Woffington? All the flutters of the fans of two centuries, and all the solid merits of bodices and petticoats, come down to us in their names; chequering Coven

To develop markings in a pattern of alternating light and dark positions, like a checkerboard.intransitive

The fruit of the wild service tree or chequer tree, Photinia villosa, syn. Sorbus terminalis