diffuser

noun

dif·​fus·​er di-ˈfyü-zər How to pronounce diffuser (audio)
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
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Scents of herbs and aromatics -- including lavender, rosemary, thyme, basil and garlic -- can also repel mosquitoes, especially when used in diffusers. Arkansas Online, 8 June 2025 This slow-cooking method, often passed over by more industrialized distilleries in favor of high-pressure autoclaves or diffusers, allows the natural sugars to caramelize gently, preserving the earthy, rich characteristics of the plant. Hudson Lindenberger, Forbes.com, 25 Apr. 2025 Chi Volumizer 4-in-1 Blowout Brush for $75: This set comes with four attachments, including an oval brush, a small diffuser, a paddle brush, and a nozzle. Nena Farrell, Wired News, 20 Apr. 2025 Its candles and reed diffusers are made in California and are free of sulfates, parabens, pesticides and phthalates. Samantha Gowen, Oc Register, 2 June 2025 See All Example Sentences for diffuser

Word History

First Known Use

1645, in the meaning defined at sense 1

Time Traveler
The first known use of diffuser was in 1645

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Cite this Entry

“Diffuser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diffuser. Accessed 28 Jun. 2025.

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