chalk
chalk1 /tʃɔːk $ tʃɒːk/ 
noun [uncountable]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 long1(21)
chalk2 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
| I |
noun [uncountable]1. soft white or grey rock formed a long time ago from the shells of small sea animals SYN limestone:
2. (also chalks) [plural] small sticks of a white or coloured substance like soft rock, used for writing or drawing:
3. chalk and cheese British English completely different from each other:
⇨ long chalk at long1(21)
| II |
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:
2. to record what someone has done, what someone should pay etc
chalk something ↔ up to
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