[chalk] n [ME, fr. OE cealc, fr. L calc-, calx lime; akin to Gk chalix pebble] (bef. 12c) 1 a: a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers b: chalk or a material resembling chalk esp. when used in the form of a crayon
2. a: a mark made with chalk b Brit: a point scored in a game -- chalky adj
[2]chalk vt (1580) 1: to write or draw with chalk
2: to rub or mark with chalk 3 a: to delineate roughly: sketch "~ out a plan of attack" b: to set down or add up with or as if with chalk: record--usu. used with up "~ up a victory" ~ vi: to become chalky