- Having one thought or pursuing one activity to the absolute or nearly absolute exclusion of all others.
"Hardcore fans' obsessive behavior may take over their lives"
- Prone to cause obsession
"The idea is too tempting, it's obsessive"
- Excessive, as results from obsession.
"A workaholic's obsessive zeal may lead to success or burnout"
- A person who is obsessed, who has an obsession