Noun | 1. | ![]() chalk - a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces calcite - a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone calcium carbonate - a salt found in nature as chalk or calcite or aragonite or limestone |
2. | chalk - a pure flat white with little reflectance | |
3. | chalk - an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant deoxyephedrine, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu, chicken feed, crank, trash, glass, ice amphetamine, pep pill, upper, speed - a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression controlled substance - a drug or chemical substance whose possession and use are controlled by law | |
4. | chalk - a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces drawing chalk - colored chalks used by artists tailor's chalk - chalk used by tailors to make temporary marks on cloth writing implement - an implement that is used to write chalk - a soft whitish calcite | |
Verb | 1. | chalk - write, draw, or trace with chalk draw - represent by making a drawing of, as with a pencil, chalk, etc. on a surface; "She drew an elephant"; "Draw me a horse" |