CHEESE.

cheese [uncountable and countable]

1 a solid food made from milk, which is usually yellow or white in colour, and can be soft or hard:

half a kilo of cheese

a cheese sandwich

Sprinkle with the grated cheese.

a selection of English cheeses

piece/bit/slice/lump etc of cheese

cow's/goat's/sheep's cheese (=from the milk of a cow etc)

2

 (say) cheese!

spoken used to tell people to smile when you are going to take their photograph

➔ big cheese

 ; ➔ chalk and cheese

 at chalk1 (3)

Definition from the Longman Dictionary of Contemporary English 
Advanced Learner's Dictionary.