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English definition of “chalk”

chalk

noun uk   /tʃɔːk/ us    /tʃɑːk/

chalk noun (ROCK)

[ U] a type of soft white rock

chalk noun (FOR DRAWING)

[C or U] a stick of this rock or a similar substance used for writing or drawing: He picked up a piece of chalk and wrote the answer on the blackboard. coloured chalks
chalky
adjective uk   /ˈtʃɔː.ki/ us    /ˈtʃɑː-/
The soil in this area is very chalky (= contains chalk).
chalkiness
noun [U] uk   /ˈtʃɔː.ki.nəs/ us    /ˈtʃɑː-/

chalk

verb [I or T] uk   /tʃɔːk/ us    /tʃɑːk/
to write something with a piece of chalk
Phrasal verbs
(Definition of chalk from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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