obsessive: Meaning and Definition of

ob•ses•sive

Pronunciation: (ub-ses'iv), [key]
— adj.
  1. being, pertaining to, or resembling an obsession: an obsessive fear of illness.
  2. causing an obsession.
  3. excessive, esp. extremely so.
—n.
  1. someone who has an obsession or obsessions; a person who thinks or behaves in an obsessive manner.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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