obsessively

UK: /əbˈsɛsɪvli/

WordReference Random House Learner's Dictionary of American English © 2025

ob•sess•ive /ɑbˈsɛsɪv/  adj. 

1. of, being, or resembling an obsession:
   an obsessive fear of disease.
2. possessed or tending to be possessed by obsessions:
   an obsessive personality.

ob•sess•ive•ly, adv. See -sess-.

WordReference Random House Unabridged Dictionary of American English © 2025

ob•ses•sive  (əb ses′iv), adj. 

1. being, pertaining to, or resembling an obsession:
   an obsessive fear of illness.
2. causing an obsession.
3. excessive, esp. extremely so.

n. 

4. someone who has an obsession or obsessions;
   a person who thinks or behaves in an obsessive manner.

• obsess(ion) + -ive 1910–15

ob•ses′sive•ly, adv. 
ob•ses′sive•ness, n.