micro

1 of 3

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 3

noun

plural micros
1
: microcomputer
2
: microprocessor

micro-

3 of 3

combining form

see micr-

Examples of micro in a Sentence

Recent Examples on the Web
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Adjective
Sigma added a full-size HDMI port, which is more durable than the original fp’s micro HDMI option, alongside two USB-C ports. — Andrew Liszewski, The Verge, 23 Oct. 2026 Plainly put, consumers buy toothpaste, groceries, and cleaning supplies regardless of macro or micro economic stress. — Michael Khouw, CNBC, 21 Oct. 2026 His award-winning micro-business column has appeared in IEEE Microwave Magazine since 2011. — Joanna Goodrich, IEEE Spectrum, 21 Oct. 2026 Different cultures are ideal for different times, at both the macro and micro levels. — Tom Ulbrich, Forbes.com, 16 Oct. 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

Phrases Containing micro

Rhymes for micro

See All Rhymes for micro

Browse Nearby Words

micrinite
micro
micro-
See all Nearby Words

Cite this Entry

“Micro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micro. Accessed 27 Oct. 2026.

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Kids Definition

micro

adjective
mi·​cro
ˈmī-krō
: microscopic sense 3

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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