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Definition of diffuser

diffuser

/dɪˈfjuːzɚ/
dif · fus · er

Plural:diffusers
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diffuser Lexical Profile

diffuser Game Scores & Validity

• noun

1

A device used to disperse essential oils, fragrances, or moisture evenly into the surrounding air.

Example

"She placed a reed diffuser on the bathroom counter to keep the room smelling fresh."


2

A translucent material or optical attachment placed in front of a light source to scatter the light, creating a softer and more even illumination.

Example

"The photographer used a flash with a diffuser to avoid casting harsh, uncomplimentary shadows on the subject's face."


3

A shaped section of a vehicle's underbody or an engine duct designed to decelerate the flow of air and increase its pressure, thereby improving aerodynamic stability or efficiency.

Example

"The new Formula One car features a heavily modified rear diffuser to increase downforce during high-speed cornering."

Synonyms
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Antonyms
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• Rhymes for diffuser

Word Origin & Etymology

Formed from the verb 'diffuse' (from Latin 'diffundere', meaning 'to pour out or scatter') combined with the agent suffix '-er'.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Diffuser. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/diffuser
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