chalk (chalks plural & 3rd person present) (chalking present participle) (chalked past tense & past participle )
1 n-uncount Chalk is a type of soft white rock. You can use small pieces of it for writing or drawing with.
...the highest chalk cliffs in Britain...
2 n-uncount Chalk is small sticks of chalk, or a substance similar to chalk, used for writing or drawing with.
...somebody writing with a piece of chalk.
3 verb If you chalk something, you draw or write it using a piece of chalk.
He chalked the message on the blackboard... V n
4 If you say that two people or things are like chalk and cheese, you are emphasizing that they are completely different from each other.
(BRIT)
♦
as different as chalk and cheese phrase
(emphasis)
The two places, he insists, are as different as chalk and cheese...