engrossed
Definitions
Having all one's attention or interest absorbed by someone or something.
To have been occupied completely or exclusively.
Examples
She was so engrossed in her book that she didn't hear the doorbell ring.
The children were completely engrossed in the movie, sitting perfectly still for two hours.
Synonyms
absorbed immersed captivated preoccupied riveted fascinated intent
Antonyms
distracted inattentive bored uninterested indifferent detached unfocused