Relating to or characterized by a tendency to dwell on unwanted thoughts or ideas or perform certain repetitious rituals, especially as a defense against anxiety from unconscious conflicts: obsessive-compulsive behavior.
An obsessive-compulsive person.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.