de Sitter space

noun

: the simplest hypothetical space-time that has positive curvature
Those clues, in particular, may be applied to the most symmetric solution of Einstein's equations with positive cosmological constant and no matter—de Sitter space.Thomas Banks, Physics Today, March 2004
compare anti-de sitter space

Word History

First Known Use

1988, in the meaning defined above

Time Traveler
The first known use of de Sitter space was in 1988

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!

Dictionary Entries Near de Sitter space

Cite this Entry

“De Sitter space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/de%20Sitter%20space. Accessed 27 Jan. 2023.

Love words? Need even more definitions?

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


Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
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?

PLAY