CHALK

Definition of CHALK

  1. (noun)a soft whitish calcite
  2. (noun)a pure flat white with little reflectance
  3. (noun)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
  4. (noun)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
  5. (verb)write, draw, or trace with chalk