obsessive

 
Pronunciation: /əbˈsɛsɪv/

adjective

  • of the nature of an obsession: people dogged by obsessive jealousy
  • affected by an obsession: she became obsessive about her school work

noun

  • a person who is affected by an obsession: he’s an obsessive, obsessed with having complete collections of things

Derivatives

obsessively

adverb

obsessiveness

noun