mi·​cro | \ˈmī-(ˌ)krō \

Definition of micro 

(Entry 1 of 2)

1 : very small especially : microscopic

2 : involving minute quantities or variations


plural micros

Definition of micro (Entry 2 of 2)

Examples of micro in a Sentence

Recent Examples on the Web: Adjective

The large professional kitchen is shared by a number of food start-ups—food trucks and other idealistic denizens of the new food economy (one company packages micro-greens from a nearby rooftop garden). Grant Cornett, Vogue, "The Rise of Refugee Cuisine—a Food-World Trend to Feel Good About," 17 Aug. 2018 Pixie Cuts Make a Comeback Inspired by Jean Seberg, who famously chopped off her hair for her breakout role in 1957’s Saint Joan, hairstylist Guido Palau gave six rising models androgynous, micro-fringed pixie cuts backstage at Prada. Lauren Valenti, Vogue, "6 Top Beauty Trends That Dominated Milan Fashion Week," 24 Sep. 2018 By gathering data about global urban life on the macro and micro scales, the Urban Dynamics Institute has the potential to inform similar progressive changes in urban policy and design. Emily Strasser, Curbed, "A secret city opens up," 8 Aug. 2018 Mini, micro, teacup, pixie: There are lots of different names that breeders use to describe their pigs. Marygrace Taylor, Good Housekeeping, "8 Things You Should Know Before Adopting a Mini Pig," 12 July 2018 For pressures both macro and micro, the program’s built-in support system comes in handy. New York Times, "Falling for the Lure of the Stage. The Backstage.," 18 June 2018 While micro-scale production of saffron does exist in the United States, most saffron found here is imported. Andy Baraghani, Bon Appetit, "What Is Saffron, the World's Most Legendary Spice?," 5 Feb. 2018 Public Greens sources local produce and operates a micro farm and bee hives at the Broad Ripple location along Monon Trail. Liz Biro, Indianapolis Star, "Another Patachou restaurant is coming to Downtown Indianapolis," 2 July 2018 The repercussions—both micro and macro—are devastating. Kristen Bellstrom, Fortune, "Maxine Waters, Donald Trump, #MeToo Stats: Broadsheet June 26," 26 June 2018

Recent Examples on the Web: Noun

The most micro of the micro among these new buildings is the aPodment Suites at Riano in Ballard, which opened earlier this year. Gene Balk / Fyi Guy, The Seattle Times, "One in 10 Seattle homes have just one room for first time ever," 9 Oct. 2018 What if a macro-product tastes better - and costs less - than a local micro-product? Lou Bustamante, San Francisco Chronicle, "With the idea of regionalism, will more Bay Area bars champion local spirits?," 28 Mar. 2018 Krulak estimated that there are about 30 modular buildings in New York, including Carmel Place, a 55-unit micro-apartment building in Kips Bay, completed in 2016. Stefanos Chen, The Seattle Times, "Real estate technology that could have a lasting effect on housing," 20 Nov. 2018 Though the system includes micro-SD support, Switch consoles cannot play back your personal media files, and the Switch eShop only offers one other official video-streaming app: Hulu. Sam Machkovech, Ars Technica, "The media-starved Nintendo Switch just got a YouTube shot in the arm," 8 Nov. 2018 And just as fun and cleverly off-kilter were the styles, from a flamingo-hued half-up look remixed with twin raver knots to a hyper-bleached pixie accented with a single fuchsia micro braid trailing down the back like an ethereal rattail. Lauren Valenti, Vogue, "Eye-Popping Hair Rules the Street at Tokyo Fashion Week," 19 Oct. 2018 Amazingly, not long ago this thriving micro-farm was a scrappy expanse of grass and weeds. Louisa Shafia, Good Housekeeping, "Everything You Need to Know About Starting a Vegetable Garden," 3 May 2018 For this listener, the micro-inflections in phrasing and dynamics often worked against the music’s broader expressive arc, but the performance overall drew hearty approval from the Shed audience. Jeremy Eichler, BostonGlobe.com, "Tanglewood opens with Bernstein’s exuberance, Lang Lang’s return," 8 July 2018 Sullivan and Cesario met while working for ethical fashion brands based in Uganda, helping impoverished women gain skills, savings, and eventually the money and know-how to start their own micro-enterprises. Hannah Wallace, Bon Appetit, "The Nut Butter Company Helping Formerly Homeless and Trafficked Women Build New Careers," 14 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'micro.' 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 micro


1923, in the meaning defined at sense 1


1971, in the meaning defined at sense 1

History and Etymology for micro



Keep scrolling for more

Learn More about micro

Statistics for micro

Last Updated

8 Dec 2018

Look-up Popularity

Time Traveler for micro

The first known use of micro was in 1923

See more words from the same year

Keep scrolling for more

More Definitions for micro


mi·​cro | \ˈmī-(ˌ)krō \

Medical Definition of micro 

1 : very small especially : microscopic

2 involving minute quantities or variations

More from Merriam-Webster on micro

Spanish Central: Translation of micro

Britannica English: Translation of micro for Arabic Speakers

Comments on micro

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


a soft lustrous wool fabric with mohair

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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


Love words? Need even more definitions?

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