diffuser

noun
dif·​fus·​er | \ di-ˈfyü-zər How to pronounce diffuser (audio) \

Definition of diffuser

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
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

Also inside this display: a diffuser plate that directs light back into the cavity. Samuel Axon, Ars Technica, "Our first-look photos of Apple’s new Mac Pro and the Pro Display XDR," 4 June 2019 The trademark covers hair styling products, shampoos and conditioners, hair masks, curling irons, flat irons, hair dryers and diffusers, and hair brushes and combs. Jenna Rosenstein, Harper's BAZAAR, "Kylie Hair by Kylie Jenner Is Happening," 17 May 2019 Essential oil diffusers, particularly those with timers, can be useful to fall asleep to. Danielle Corcione, Teen Vogue, "How to Fall Asleep," 12 Mar. 2019 Amazon's wide variety of deals on products like pillows, candles, diffusers, and more are the perfect gift to give yourself this holiday—or anytime, really. Tiffany Dodson, SELF, "17 Black Friday and Cyber Monday Deals on Amazon for a Cleaner, Happier Home," 22 Nov. 2018 The thoughtful guest might even mail over a diffuser in advance. Laura Regensdorf, Vogue, "10 Utterly Perfect Home Fragrances for the Holiday Hostess with the Mostest," 20 Nov. 2018 Add a few drops to your essential oil diffuser to make the whole house smell like Christmas, or apply topically to your temples, neck, and behind your ears for instant relaxation. Taysha Murtaugh, Country Living, "These Essential Oils Will Make Your Entire Home Smell Like Christmas," 14 Oct. 2018 Lavender bath bombs; lavender candles; deodorizing lavender sachets for your shoes, car or underwear drawer; lavender diffusers; lavender essential oils; even lavender chill pills for humans and dogs. Joanna Klein, The Seattle Times, "Lavender’s soothing scent could be more than just folk medicine," 26 Oct. 2018 This diffuser will calm you down and keep those close quarters smelling fresh. Carolyn Twersky, Seventeen, "15 Care Package Items for Every Kind of College Student," 2 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diffuser.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of diffuser

1645, in the meaning defined at sense 1

History and Etymology for diffuser

diffuse entry 2 + -er entry 2

Keep scrolling for more

Learn More about diffuser

Statistics for diffuser

Last Updated

5 Jul 2019

Look-up Popularity

Time Traveler for diffuser

The first known use of diffuser was in 1645

See more words from the same year

More from Merriam-Webster on diffuser

Rhyming Dictionary: Words that rhyme with diffuser

Comments on diffuser

What made you want to look up diffuser? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

providing supplementary assistance

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!