chalk

n. white limestone; object which is made of limestone (or something which resembles limestone) and is used for writing on blackboards or slates

v. write or mark with chalk

Chalk (IPA: ) is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. It forms under relatively deep marine conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-organisms called coccolithophores. It is common to find flint and chert nodules embedded in chalk.
See more at Wikipedia.org...

Noun
1. a soft whitish calcite
(hypernym) calcite
(substance-meronym) calcium carbonate
2. a pure flat white with little reflectance
(hypernym) white, whiteness
3. amphetamine used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
(synonym) methamphetamine, methamphetamine hydrochloride, Methedrine, meth, deoxyephedrine, chicken feed, crank, glass, ice, shabu, trash
(hypernym) amphetamine, pep pill, upper, speed
4. a piece of chalk (or similar substance) used for writing on blackboards or other surfaces
(hypernym) writing implement
(hyponym) drawing chalk
Verb
1. write, draw, or trace with chalk
(hypernym) draw
(entail) trace, draw, line, describe, delineate

(v. t.)
To rub or mark with chalk.
  

(v. t.)
To manure with chalk, as land.
  

(v. t.)
To make white, as with chalk; to make pale; to bleach.
  

(n.)
Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon.
  

(n.)
A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone.
  

For a woman to dream of chalking her face, denotes that she will scheme to obtain admirers. To dream of using chalk on a board, you will attain public honors, unless it is the blackboard; then it indicates ill luck. To hold hands full of chalk, disappointment is foretold.