a reaction or feeling that you are sure is right, although you cannot give a reason for it:
He had a gut feeling that Sarah was lying.
the courage and determination you need to do something difficult or unpleasant:
It takes guts to start a new business on your own.
have the guts (to do something)
No-one had the guts to tell Paul what a mistake he was making.
inside your body
all the organs in someone's body, especially when they have come out of their body:
There were blood and guts all over the place.
b) HBA [countable]
the tube through which food passes from your stomach [= intestine]:
It can take 72 hours for food to pass through the gut.
someone's stomach, especially when it is large [= belly]:
He felt as if someone had just kicked him in the gut.
Phil has a huge beer gut (=unattractive fat stomach caused by drinking too much beer).
a type of strong string made from the intestine of an animal, and used for musical instruments such as violins ➔ catgut
the parts inside a machine or piece of equipment
the most important or basic parts of something
most important parts
the guts of the problem
if you know something at gut level, you feel sure about it, though you could not give a reason for it:
She knew at gut level that he was guilty.
9 British English informal
used to say that you would like to punish someone severely for something they have done