Synonyms of 'preoccupied'
1 They were preoccupied with their own concerns.
They were completely absorbed in each other.
She was silent for a while, lost in thought.
She looked from one intent face to another.
He's really becoming immersed in his work.
He didn't notice because he was too engrossed in his work.
I noticed that everyone was watching me with rapt attention.
2 He was too preoccupied to notice what was going on.
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inattentive or forgetful
In his later life he became even more absent-minded.
lost in thought
The same abstracted look was still on her face.
Video: pronunciation of 'preoccupied'
Thesaurus for preoccupied from the Collins English Thesaurus