diffuser

noun

dif·​fus·​er di-ˈfyü-zər 

plural diffusers

1

: one that diffuses: such as

a

: a device (such as a reflector) for distributing the light of a lamp evenly

b

: a screen (as of cloth or frosted glass) for softening lighting (as in photography)

c

: a device (such as slats at different angles) for deflecting air from an outlet in various directions

d

: a device that produces a fine mist of water and often essential oils

2

: a device for reducing the velocity and increasing the static pressure of a fluid passing through a system

Examples of diffuser in a Sentence

Recent Examples on the Web

The diffusers use the same expensive proprietary scent pods that start at $55. —Louryn Strampe, WIRED, 20 Feb. 2025

The lightweight six-inch diffuser strikes the right balance between portability and performance. —Brigitt Earley, Glamour, 14 Feb. 2025

All the cars were of the same design, featuring a double diffuser that gave the Brawn GP team a flying start to the season. —Erik Shilling, Robb Report, 6 Feb. 2025

The translucent green diffuser, priced at $18.97 at Walmart, has a large tank and adds a calming touch to your space. —Nora Colomer, Fox News, 4 Feb. 2025

Word History

Etymology

diffuse entry 2 + -er entry 2

First Known Use

1645, in the meaning defined at sense 1

Rhymes for diffuser

• abuser
• accuser
• boozer
• bruiser
• chooser
• cruiser
• loser
• user
• multiuser