Definition of: chalk

(chôk) noun
1. A soft, grayish–white or yellowish compact limestone, largely composed of the shells of foraminifers.
2. A piece of chalk or chalklike material, either natural or artificial and frequently colored, used for marking or drawing.
3. A score in a game, because often recorded with chalk.
4. A debit, formerly often marked with chalk upon the wall or door, as of an ale house.
—v.t.
1. To put chalk on or in; also, to mark with chalk; to bleach.
2. To record, as charges or debits; score.
3. To put an official mark on.
—to chalk up
1. To raise the price of.
2. To score.
3. To give credit.
—adjective Made with chalk. [OE cealc <L calx limestone]
—chalk′·i·ness noun
—chalk′y adjective