✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

micro

1 of 2

adjective

mi·​cro ˈmī-(ˌ)krō How to pronounce micro (audio)
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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Expect micro-cultural collisions and unlikely collabs as this spoiled child discovers there are other Main Characters. Brittany Allen, Literary Hub, 19 Nov. 2025 Technology is reinventing one of the oldest human crafts in a vast space called a micro factory. Atharva Gosavi, Interesting Engineering, 14 Nov. 2025
Noun
In our cover shoot, Megan embodies the season’s biggest trends — icy blue, two-piece sets, wine and burgundy shades, micro-hemlines — with effortless charm. Brittany Talarico, PEOPLE, 24 Nov. 2025 These micro-breaks prevent the cumulative tension that comes from repetitive chopping, stirring and hovering over the stove. Dana Santas, CNN Money, 24 Nov. 2025 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 29 Nov. 2025.

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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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