\ ˈleks How to pronounce lex (audio) \
plural leges\ ˈlā-​(ˌ)gās How to pronounce leges (audio) \

Definition of lex

: law

Examples of lex in a Sentence

Recent Examples on the Web An old legal maxim comes to mind: De minimis non curat lex — the law doesn’t care about trifles. New York Times, "Can We Stay Friends With Someone Who Betrayed His Pregnant Partner?," 14 Jan. 2020 And, lex credendi, lex orandi, Catholic liturgical practices demonstrate the Church’s belief in the reality of Christ’s Eucharistic immanence. John Hirschauer, National Review, "What Is Pope Francis Saying about Communion?," 10 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lex.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of lex

circa 1775, in the meaning defined above

History and Etymology for lex

Latin leg-, lex

Keep scrolling for more

Learn More about lex

Time Traveler for lex

Time Traveler

The first known use of lex was circa 1775

See more words from the same year

Statistics for lex

Cite this Entry

“Lex.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lex. Accessed 8 Jul. 2020.

Keep scrolling for more

More from Merriam-Webster on lex

Rhyming Dictionary: Words that rhyme with lex

Nglish: Translation of lex for Spanish Speakers

Britannica.com: Encyclopedia article about lex

Comments on lex

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?


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!