having an obsession (usually followed by with or by ): He is obsessed with eliminating guilt.
having or displaying signs of an obsession: The audiophile entered the record store wearing an obsessed smile.

1835–45; obsess + -ed2

self-obsessed, adjective
unobsessed, adjective
Dictionary.com Unabridged


verb (used with object)
to dominate or preoccupy the thoughts, feelings, or desires of (a person); beset, trouble, or haunt persistently or abnormally: Suspicion obsessed him.
verb (used without object)
to think about something unceasingly or persistently; dwell obsessively upon something.

1495–1505; < Latin obsessus, past participle of obsidēre to occupy, frequent, besiege, equivalent to ob- ob- + -sid(ēre) combining form of sedēre to sit

obsessingly, adverb
obsessor, noun

abscess, obsess.

1. possess, control, haunt.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Obsessed
World English Dictionary
obsess (əbˈsɛs)
1.  (tr; when passive, foll by with or by) to preoccupy completely; haunt
2.  (intr; usually foll by on or over) to worry neurotically or obsessively; brood
[C16: from Latin obsessus besieged, past participle of obsidēre, from ob- in front of + sedēre to sit]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

c.1500, "to besiege," from L. obsessus, pp. of obsidere "besiege, occupy," lit. "sit opposite to," from ob "against" + sedere "sit." Of evil spirits, "to haunt," is from 1530s.

1620s, pp. adj. from obsess.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
Of course, the urge to get above it all has obsessed photographers since the
  invention of the camera.
He was obsessed with tradition and obsessed with overturning it.
And for riders obsessed with the vibrations of jacket-flapping velocity, there
  is no alternative.
He's obsessed with the monster, convinced it will come for him in the night.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature