Bayes' theorem

noun
\ ˈbāz- How to pronounce Bayes' theorem (audio) \
variants: or less commonly Bayes theorem or less commonly Bayes's theorem

Definition of Bayes' theorem

: a theorem about conditional probabilities: the probability that an event A occurs given that another event B has already occurred is equal to the probability that the event B occurs given that A has already occurred multiplied by the probability of occurrence of event A and divided by the probability of occurrence of event B

First Known Use of Bayes' theorem

1830, in the meaning defined above

History and Etymology for Bayes' theorem

Thomas Bayes †1761 English mathematician

Keep scrolling for more

Learn More about Bayes' theorem

Dictionary Entries near Bayes' theorem

Bayer 205

bayerite

Bayer process

Bayes' theorem

Bayesian

bayeta

Bayeux

Statistics for Bayes' theorem

Look-up Popularity

Time Traveler for Bayes' theorem

The first known use of Bayes' theorem was in 1830

See more words from the same year

Comments on Bayes' theorem

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

WORD OF THE DAY

marked by turns or indirection

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

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!