mi·​cro·​world | \ ˈmī-krō-ˌwər(-ə)ld How to pronounce microworld (audio) \

Definition of microworld

: a small universe specifically : the natural universe observed at the microscopic or submicroscopic level

Examples of microworld in a Sentence

Recent Examples on the Web Logic demands that there does not exist an unknown, deterministic layer in the microworld. Lee Phillips, Ars Technica, 28 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microworld.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of microworld

1923, in the meaning defined above

Learn More About microworld

Time Traveler for microworld

Time Traveler

The first known use of microworld was in 1923

See more words from the same year

Dictionary Entries Near microworld

microwave spectrum



See More Nearby Entries 

Statistics for microworld

Cite this Entry

“Microworld.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microworld. Accessed 5 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on microworld

Britannica.com: Encyclopedia article about microworld


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

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