'obsessed' definitions:

Definition of 'obsessed'

(from WordNet)
adjective
Having or showing excessive or compulsive concern with something; "became more and more haunted by the stupid riddle"; "was absolutely obsessed with the girl"; "got no help from his wife who was preoccupied with the children"; "he was taken up in worry for the old woman" [syn: haunted, obsessed, preoccupied, taken up(p)]
adjective
Influenced or controlled by a powerful force such as a strong emotion; "by love possessed" [syn: obsessed, possessed(p)]

Synonyms of 'obsessed'

From: Moby Thesaurus