De Morgan's theorem

noun
De Mor·​gan's theorem | \ də̇ˈmȯrgənz-, dēˈ- \

Definition of De Morgan's theorem

: one of a pair of theorems in logic: the denial of a conjunction is equivalent to the alternation of the denials and the denial of an alternation is equivalent to the conjunction of the denials

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!

History and Etymology for De Morgan's theorem

after Augustus De Morgan †1871 English mathematician

Keep scrolling for more

Learn More About De Morgan's theorem

Dictionary Entries Near De Morgan's theorem

De Morgan

De Morgan's theorem

de mortuis nil nisi bonum

See More Nearby Entries 

Statistics for De Morgan's theorem

Cite this Entry

“De Morgan's theorem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/De%20Morgan%27s%20theorem. Accessed 18 Sep. 2021.

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

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
True or False

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

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

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