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lex

1 American  
[leks] / lɛks /

noun

plural

leges
  1. law.


lex. 2 American  

abbreviation

  1. lexical.

  2. lexicon.


lex British  
/ lɛks /

noun

  1. a system or body of laws

  2. a particular specified law

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of lex

First recorded in 1490–1500, lex is from the Latin word lēx

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He told AFP Babis most probably complied with the Czech conflict of interest law, dubbed "lex Babis".

From Barron's • Mar. 12, 2026

But dura lex, sed lex — the law is hard, but it is the law — and the law in California forbade slavery.

From Los Angeles Times • Feb. 9, 2021

Salus populi suprema lex, he reminds us: public health must be the highest law.

From Nature • Oct. 14, 2019

The classical root of “privilege,” privus lex, means “private law.”

From Washington Post • Sep. 27, 2018

Thus Descartes opted for the least common phrase available to him in French as a translation for lex naturae in order to give his phrase a precise reference to scientific laws, not moral ones.

From "The Invention of Science" by David Wootton