characterized by or constituting an obsession; "the obsessional character of his response"; "obsessive gambling"
An obsessive is someone who is obsessive about something or who behaves in an obsessive way. I am not an obsessive. Not at all. thinking or worrying about something all the time, so that you do not think about other things enough - used to show disapproval. someone whose behaviour is obsessive
Having one thought or pursuing one activity to the absolute or nearly absolute exclusion of all others
If someone's behaviour is obsessive, they cannot stop doing a particular thing or behaving in a particular way. Williams is obsessive about motor racing + obsessively ob·ses·sive·ly He couldn't help worrying obsessively about what would happen The Ministry is being obsessively secretive about the issue