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cheese

cheese /ˈtʃiːz/ noun
plural cheeses
cheese
/ˈtʃiːz/
noun
plural cheeses
Britannica Dictionary definition of CHEESE
: a yellow or white solid food that is made from milk
[noncount]
[count]
often used before another noun

say cheese

◊ If you say the word “cheese” in an exaggerated way, you look like you are smiling, so someone who is taking your photograph and wants you to smile will tell you to say cheese.
see also big cheese