mi·​cro·​in·​struc·​tion ˌmī-krō-in-ˈstrək-shən How to pronounce microinstruction (audio)
: a computer instruction that activates the circuits necessary to perform a single machine operation usually as part of the execution of a machine-language instruction

Word History

First Known Use

1959, in the meaning defined above

Time Traveler
The first known use of microinstruction was in 1959

Dictionary Entries Near microinstruction

Cite this Entry

“Microinstruction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microinstruction. Accessed 5 Feb. 2023.

Love words? Need even more definitions?

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

The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
Name That Thing

You know what it looks like… but what is it called?

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?