obsession

American  

[uhb-sesh-uhn] / əbˈsɛʃ ən /

noun

1. the domination of one's thoughts or feelings by a persistent idea, image, desire, etc.

2. the idea, image, desire, feeling, etc., itself.

3. the state of being obsessed.

4. the act of obsessing.

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obsession British  

/ əbˈsɛʃən /

noun

1. psychiatry a persistent idea or impulse that continually forces its way into consciousness, often associated with anxiety and mental illness

2. a persistent preoccupation, idea, or feeling

3. the act of obsessing or the state of being obsessed

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obsession Cultural  

1. A preoccupation with a feeling or idea. In psychology, an obsession is similar to a compulsion.

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Other Word Forms

• nonobsession noun
• nonobsessional adjective
• obsessional adjective
• obsessionally adverb
• self-obsession noun

Etymology

Origin of obsession

First recorded in 1505–15; from Latin obsessiōn-, stem of obsessiō “blockade, siege,” from obsess(us) “occupied, besieged” (past participle of obsidēre “to occupy, besiege”; obsess ) + -iō -ion

Explanation

If you have an obsession, you're totally fixated on something and unhealthily devoted to it. Some common obsessions include fantasy football leagues, celebrity gossip, and Elvis memorabilia. Obsession is kind of like a passion for something that crosses the line into crazy territory. Sometimes people get so preoccupied with their obsessions that it makes them anxious or emotionally unstable. If you have an obsession with the Yankees, for example, you might go to every single game, skip work to watch spring training, paper your room with Yankees posters, and write love notes to Derek Jeter.

Example Sentences

Whether the plan is to fan out with old favorites or find your next artist obsession, the festival’s three-day buffet of sound has you covered.

From Los Angeles Times • Apr. 9, 2026

During my first watch, I thought this would be a run-of-the-mill, substandard thriller: Establish the characters, ramp up the obsession, throw a little violence in.

From Salon • Apr. 5, 2026

What’s going on with the obsession with reviving archaic occupations, like learning from artisans fixing old shoes?

From Slate • Apr. 4, 2026

And that's just one piece of TikTok's newest obsession, an AI-generated series called Fruit Love Island.

From BBC • Mar. 28, 2026

Somehow, without my realizing it, my obsession with finding Halliday’s Easter egg was gradually being supplanted by my obsession with Art3mis.

From "Ready Player One: A Novel" by Ernest Cline

Related Words

• compulsion
• delusion
• enthusiasm
• fascination
• infatuation
• mania
• passion
• phobia
• preoccupation