n.
Function: transitive verb
Date: 1580
1 : to write or draw with chalk
2 : to rub or mark with chalk < chalk a pool cue>
3 a : to delineate roughly : SKETCH < chalk out a plan of attack> b : to set down or add up with or as if with chalk : RECORD ― usually used with up < chalk up the totals>
intransitive verb : to become chalky <the paint had begun to chalk >