This is the 352nd most frequent Norwegian word.
flyet
"The plane" or "the airplane."
Here, 'flyet' is a definite singular noun, referring to a specific plane that is about to land.
Flyet lander snart.
The plane is landing soon.
In this sentence, 'flyet' again refers to a specific plane, observed in the sky.
Jeg ser flyet på himmelen.
I see the plane in the sky.
'Flyet' here denotes a particular plane that someone had been waiting for throughout the day.