Bedeutung von “fly” — Learner’s Dictionary

fly

noun [ C ] us uk /flaɪ/
INSECT

B1 a small insect with two wings:

There was a fly buzzing around in the kitchen.
TROUSERS also UK flies [ plural ]

the part where trousers open and close at the front:

a button/zip fly

(Definition von “fly noun” aus dem Cambridge Learner's Dictionary © Cambridge University Press)