mi·​cro | \ ˈmī-(ˌ)krō How to pronounce micro (audio) \

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

Despite his visible discomfort, Big is docile amidst the Dalton family’s many micro-aggressions in order to keep his job. Prince Shakur, Teen Vogue, ""Native Son" Reflects a World Where Young Black Men Are Often Set Up to Fail," 16 Apr. 2019 The Spin 11 starts at $349, and all configurations have an 11.6-inch 1366×768 IPS Touchscreen, two USB-C (3.1 gen 1) ports, two USB 3.0 type A ports, a headphone jack, a micro SD card reader, a 5MP camera, and a weight of 2.75 pounds. Ron Amadeo, Ars Technica, "Acer’s new Chromebooks start at $279," 23 Jan. 2018 And yet the rover found little pockets along the way where extreme, brine-loving microbes thrived, make those micro-residents some of the hardiest organisms on Earth. John Wenz, Popular Mechanics, "A Rover Finds Life in Mars-Like Barrenness in South America," 28 Feb. 2019 Authorities found the pooch, donning a pink collar, with a micro-chip linking her to Anderson. Nicole Darrah, Fox News, "Dog stuffed into trash bin dies; owner arrested," 24 Sep. 2018 There, the capsule breaks down, freeing a tiny, inflatable balloon that drives a micro needle into the intestinal wall to deliver the dose. Mike Feibus, USA TODAY, "Afraid of needles? These start-ups are working on alternatives," 8 July 2018 Clarke designed a micro-strip SQUID amplifier (MSA) that has been incorporated into ADMX. Douglas Messier, Space.com, "Super-Sensitive Device Seeks Axions, Proposed Dark Matter Particles," 2 July 2018 In the Tehran of 1970s, women in micro-minis walked alongside those wearing full hijab. Hedia Anvar, Longreads, "How To Build An Intellectual," 23 June 2018 The micro leather and suede box bag is available to shop in a number of shades and finishes. Amy Mackelden, Harper's BAZAAR, "Kate Middleton Visits Blackpool in the Pouring Rain Wearing Michael Kors," 6 Mar. 2019

Recent Examples on the Web: Noun

Yoon adds that these micro-current devices will be packaged smaller, cheaper and come with more diverse settings than ever before. Alexandra Tunell, Harper's BAZAAR, "The Biggest Korean Beauty Trends to Know for 2016," 15 Jan. 2016 The proposal itself was a total surprise; my fiance, Tom, spent four months planning it so that every single micro-detail was customized to reflect us and our relationship. Kaye Toal, SELF, "I'm Fat and I'm Not Going to Lose Weight for My Wedding," 1 Mar. 2019 For baby gifts, check out FORAI (Friends of Refugees and Immigrants), a nonprofit that sells the cutest onesies, all of which help the artisans sustain sewing micro-businesses. Jane Mosbacher Morris, Marie Claire, "5 Easy Ways to Use Your Wallet to Create Real Change," 31 Jan. 2019 The tiers are highly debated, but basically a micro-influencer is really anyone who doesn’t have an agent or representation yet. Ashley Carman, The Verge, "Who’s your Instagram boyfriend?," 14 Nov. 2018 The battery compartment is sealed, rechargeable via micro USB, as with others, a nice feature. Andrew Northshield, Popular Mechanics, "A Former Marine Tests the Best Headlamps," 6 Nov. 2018 Amandla's words refer to the racist micro-aggression of assuming all people of a certain race look alike. Allie Gemmill, Teen Vogue, "Amandla Stenberg Called Out the Racist Idea That Black People "All Look the Same"," 10 Oct. 2018 Having a sense of gratitude often helps me out of the ‘travel is a burden’ self-talk that can cause the inevitable micro-struggles of travel to appear more dramatic. Annie Daly, SELF, "16 Ways to Stay Mentally Healthy When You Travel A LOT, From People Who Do It," 6 Dec. 2018 The company has already won contracts with the Department of Defense and Sitael, an Italian micro-satellite manufacturer, among others. Sam Blum, Popular Mechanics, "Virgin Orbit Flies Converted 747 With Rocket Attached to Its Wing For First Time," 19 Nov. 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.

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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



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Last Updated

28 Apr 2019

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Time Traveler for micro

The first known use of micro was in 1923

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More Definitions for micro


mi·​cro | \ ˈmī-(ˌ)krō How to pronounce micro (audio) \

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).


using a distributed computer network

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