What does obsession mean?
An obsession is a thought, idea, or interest that takes hold of the mind with unusual force and persistence. It can involve repeatedly dwelling on a concern, returning compulsively to a particular question, or becoming deeply absorbed in a person, task, or subject. In ordinary conversation, the term usually implies that the fixation is excessive, difficult to control, or somewhat irrational, although it can also be used less critically to describe intense artistic or intellectual preoccupations. The word is more emotionally loaded than “preoccupation”: a preoccupation simply occupies attention, while an obsession tends to dominate it. In clinical contexts, an obsession may be a persistent unwanted thought associated with ritualized behavior. Understanding the word’s strong connotation helps distinguish meaningful enthusiasm from a fixation that interferes with judgment, relationships, or everyday functioning.
nounAn idea, thought, or interest that occupies the mind to an excessive or compelling degree. It can also refer to a persistent, unusually strong fixation on a particular person, activity, or subject.
- A thought or idea that dominates the mind and is difficult to dismiss.
- An excessive, consuming interest in or attachment to a person, activity, or subject.
"Her fear of missing the train became an obsession that affected nearly every part of her day."
"The idea that he might be late consumed him with obsession."
"The exhibition reveals the artist’s obsession with light, repetition, and geometric form."
Used for multiple persistent or dominant ideas, interests, or fixations.
"Her obsessions with order and symmetry shaped the entire design."
The word comes from the Latin obsidere, meaning “to sit at” or “to besiege”—an image of a thought taking up permanent residence in the mind.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does obsession come from?
The word derives from the Latin obsessionem, a noun formed from obsidere, meaning “to sit at” or “to besiege.” In its earlier English use, “obsession” referred to the action of being beset or besieged, and later came to describe a thought or idea that occupies the mind. The same Latin root also underlies words such as “siege” and “besiege,” while the broader idea of sitting or remaining in place connects with forms such as “assiduous” and “sedentary.”
Related word forms
How obsession is actually used
In everyday use, “obsession” usually suggests a fixation that seems excessive, irrational, or difficult to control. In psychology and medicine, it may describe a persistent thought or behavior that causes significant distress or impairment. The word is often emotionally strong and can imply that the subject of the fixation is unreasonable or harmful.
Easily confused with obsession
An obsession is a compelling or excessive thought or interest, whereas obsessive describes the person or behavior characterized by such a fixation.
A preoccupation is a thought that occupies attention, while an obsession more strongly suggests an intense, persistent, or excessive fixation.