Mi·​mas | \ ˈmī-məs How to pronounce Mimas (audio) \

Definition of Mimas

: the seventh largest satellite of Saturn with a diameter of approximately 250 miles (400 km) characterized by a single enormous crater The majestic saturnian rings, having beguiled astronomers for centuries, are targeted for intense study. Saturn's smaller satellites—such as Mimas, nicknamed the “Death Star,” and Iapetus, with its strange, organic-marked sur-face—will give up much of their secrets to Cassini.— Louis D. Friedman, The Planetary Report, March/April 1994

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of Mimas

1847, in the meaning defined above

Keep scrolling for more

Learn More about Mimas

Time Traveler for Mimas

Time Traveler

The first known use of Mimas was in 1847

See more words from the same year

Statistics for Mimas

Cite this Entry

“Mimas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mimas. Accessed 25 Oct. 2020.

Comments on Mimas

What made you want to look up Mimas? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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