preoccupied

Absorbed in thought; engrossed.

Excessively concerned with something; distracted.

Formerly or already occupied.

Already used and therefore unavailable for further use. Used of taxonomic names.

Occupied previously; engrossed; hence, lost in thought; meditative; abstracted.

In zoology and botany, already used as a name for a genus, species, etc., and therefore, by the laws of priority, rejected for any other genus, species, etc., to which it has been applied.

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

Simple past tense and past participle of preoccupy.

deeply absorbed in thought