(also in pl)
the belly or abdomen
the intestine
A king may go a progress through the guts of a beggar — Shakespeare
(often used before a noun) the part of a person that responds basic emotionally or instinctively responding part of a person
a gut feeling
= catgut
the sac of silk taken from a silkworm and drawn out into a thread for use in attaching a fish hook to a fishing line
informal (in pl) the inner essential parts or workings
informal (in pl) courage or determination
a narrow water passage; a strait
bust a gut
informal to exert oneself or make a great effort
hate somebody's guts
informal to hate somebody with great intensity
[Middle English from Old English guttas (pl)]