preoccupied

Prepossessed; biased.

Already occupied.

Terrified at this uproar, which disconcerted the magician himself, she ran for shelter into the place which was preoccupied by the other lady […].

Scythrop, retiring to his tower, found his study preoccupied.

Describing a taxonomic name not available for use because it is already used for another.

In 1924 J. D. Tothill revised the nearctic species in the genus Fabriciella, a name proposed by Bezzi in 1906 to replace Fabricia Rob. D. which is preoccupied.

Concerned with something else; distracted; giving one's attention elsewhere.

I was preoccupied with a deadline at work, and I forgot his birthday.