1 [intransitive and transitive]DFC to prepare food for eating by using heat :
Where did you learn to cook?
Cook the sauce over a low heat for 10 minutes.
slices of cooked ham
a cooked breakfast
Where did you learn to cook?
Cook the sauce over a low heat for 10 minutes.
slices of cooked ham
a cooked breakfast2 [intransitive]DFC to be prepared for eating by using heat :
He could smell something delicious cooking.
Hamburgers were cooking in the kitchen.
He could smell something delicious cooking.
Hamburgers were cooking in the kitchen.3 to dishonestly change official records and figures in order to steal money or give people false information :
The Government was cooking the books and misleading the public.
cook the books
The Government was cooking the books and misleading the public.4 to be being planned in a secret way :
They've got something cooking, and I don't think I like it.
be cooking
informal
They've got something cooking, and I don't think I like it.5 used to say that someone is doing something very well :
The band's really cooking tonight.
be cooking (with gas)
spoken
The band's really cooking tonight.WORD FOCUS: cook 
fry (in oil)
boil (in hot water)
bake (bread and cakes in an oven)
roast (meat or vegetables in an oven)
microwave (using a microwave oven)
grill/broil American English (using a grill)
steam, toast, simmer, poach, barbecue, stir-fry, saute, chargrill
raw (not cooked)
rare (used about meat that has been cooked for a short time)
well-done (used about meat that has been cooked for a long time)cook ➔ cookbook, recipe, culinary

fry (in oil)
boil (in hot water)
bake (bread and cakes in an oven)
roast (meat or vegetables in an oven)
microwave (using a microwave oven)
grill/broil American English (using a grill)
steam, toast, simmer, poach, barbecue, stir-fry, saute, chargrill
raw (not cooked)
rare (used about meat that has been cooked for a short time)
well-done (used about meat that has been cooked for a long time)cook ➔ cookbook, recipe, culinary
cook something ↔ up
phrasal verb1DFC to prepare food, especially quickly :
Every night he cooked up a big casserole.
Every night he cooked up a big casserole.2 informal to invent an excuse, reason, plan etc, especially one that is slightly dishonest or unlikely to work :
the plan that Graham and Dempster had cooked up
the plan that Graham and Dempster had cooked up
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