This is the 3074th most frequent French word.
occupe
Occupied; busy.
Here, 'occupé' is used as an adjective to describe someone's state of being busy or engaged with tasks.
Je suis très occupé aujourd'hui.
I am very busy today.
In this sentence, 'occupé' functions as an adjective describing whether the seat is currently in use.
Ce siège est-il occupé?
Is this seat taken?
Here, the verb 's'occuper' is used reflexively, meaning 'to take care of' or 'to be in charge of' something.