I. chalk 1 /tʃɔːk $ tʃɒːk/ BrE AmE noun [uncountable]
[ Language: Old English ; Origin: cealc , from Latin calx ' ⇨ ↑ lime 1 (2) ', from Greek chalix 'small stone' ]
1 . soft white or grey rock formed a long time ago from the shells of small sea animals SYN limestone :
chalk cliffs
2 . ( also chalks ) [plural] small sticks of a white or coloured substance like soft rock, used for writing or drawing:
a box of coloured chalks
a piece of chalk
writing in chalk on the blackboard
3 . chalk and cheese British English completely different from each other:
The two brothers are as different as chalk and cheese.
They’re like chalk and cheese, those two.
⇨ long chalk at ↑ long 1 (21)
II. chalk 2 BrE AmE verb [T + up/on]
to write, mark, or draw something with chalk
chalk something ↔ up phrasal verb
1 . to succeed in getting something, especially points in a game:
Seattle chalked up another win last night over Denver.
2 . to record what someone has done, what someone should pay etc
chalk something ↔ up to
You can chalk the drinks up to my account.
3 . chalk it up to experience informal to accept a failure or disappointment calmly and regard it as an experience that you can learn something from