a soft fine-grained white sedimentary rock consisting of nearly pure calcium carbonate, containing minute fossil fragments of marine organisms, usually without a cementing material
2.
a piece of chalk or a substance like chalk, often coloured, used for writing and drawing on a blackboard
3.
a line, mark, etc made with chalk
4. billiards, snooker
a small cube of prepared chalk or similar substance for rubbing the tip of a cue
5. British
a score, tally, or record
6. as alike as chalk and cheese
7. by a long chalk
8. can't tell chalk from cheese
9. not by a long chalk
10. (modifier)
made of chalk
verb
11.
to draw or mark (something) with chalk
12. (transitive)
to mark, rub, or whiten with or as if with chalk
13. (intransitive)
(of paint) to become chalky; powder
14. (transitive)
to spread chalk on (land) as a fertilizer
Derived forms
chalklike (ˈchalkˌlike)
adjective
chalky (ˈchalky)
adjective
chalkiness (ˈchalkiness)
noun
Word origin
Old English cealc, from Latin calx limestone, from Greek khalix pebble