- chalk [chôk]n.[ME < OE cealc < L calx, lime, limestone: see CALCIUM]1. a white, gray, or yellowish limestone that is soft, porous, and easily pulverized, composed almost entirely of calcite from minute sea shells2. any substance like chalk in color, texture, etc.3. a piece of chalk, often colored, used for drawing, writing on a blackboard, etc.4. a mark or line made with chalk5. Brit. a score or tally, as in a game or as of credit givenadj.1. made or drawn with chalk☆ 2. Horse Racing Slanga) favored to win, place, or showb) betting on favorites onlyvt.1. Brit. to treat with chalk; lime or fertilize (soil)2. to rub or smear with chalk; specif., to rub chalk on the tip of (a billiard cue)3. to make pale4. to write, draw, or mark with chalkvi.to become chalky or powdery, as a painted surface——————chalk out1. to mark out as with chalk2. to outline; plan——————chalk up1. to score, get, or achieve2. to charge or credit——————not by a long chalk[Brit. Informal] not by any means; not at all——————walk a chalk lineInformal to behave with strict propriety or obedience
English World dictionary. V. Neufeldt. 2014.