micro

1 of 2

adjective

mi·​cro ˈmī-(ˌ)krō How to pronounce micro (audio)
Synonyms of micronext
1
: very small
especially : microscopic
2
: involving minute quantities or variations

micro

2 of 2

noun

plural micros

Examples of micro in a Sentence

Recent Examples on the Web
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Adjective
The blini is like a micro pancake made of buckwheat that is slightly nutty. Carlos Rico, San Diego Union-Tribune, 18 Feb. 2026 Synthetic fibers like polyester can leave tiny scratches on the surface, and dirty cloths can cause micro scratches. Karen Brewer Grossman, Southern Living, 17 Feb. 2026 For her iteration, the How to Lose a Guy in 10 Days alum embraced lingerie dressing in a plunging black lace tank top with micro spaghetti straps and a keyhole chest cutout. Lara Walsh, InStyle, 16 Feb. 2026 On board is a micro rover built by ispace called Tenacious as well as several commercial payloads. Richard Tribou, The Orlando Sentinel, 16 Feb. 2026 See All Example Sentences for micro

Word History

Etymology

Adjective

independent use of micro-

Noun

by shortening

First Known Use

Adjective

1923, in the meaning defined at sense 1

Noun

1971, in the meaning defined at sense 1

Time Traveler
The first known use of micro was in 1923

Browse Nearby Words

Cite this Entry

“Micro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micro. Accessed 20 Feb. 2026.

Kids Definition

micro

adjective
mi·​cro
ˈmī-krō

Medical Definition

micro

adjective
mi·​cro ˈmī-(ˌ)krō How to pronounce micro (audio)
1
: very small
especially : microscopic
2
involving minute quantities or variations

More from Merriam-Webster on micro

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