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Synonyms

lawful

American  
[law-fuhl] / ˈlɔ fəl /

adjective

  1. allowed or permitted by law; not contrary to law.

    a lawful enterprise.

    Synonyms:
    legal
  2. recognized or sanctioned by law; legitimate.

    a lawful marriage; a lawful heir.

    Synonyms:
    licit
  3. appointed or recognized by law; legally qualified.

    a lawful king.

  4. acting or living according to the law; law-abiding.

    a lawful man; a lawful community.


lawful British  
/ ˈlɔːfʊl /

adjective

  1. allowed, recognized, or sanctioned by law; legal

"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

Other Word Forms

Etymology

Origin of lawful

First recorded in 1250–1300, lawful is from the Middle English word laghful. See law 1, -ful

Explanation

When something's legal, or the rules allow it, you can call it lawful. It's lawful to plant a tree in your yard, but it's not lawful to dig up a tree in the city park. Things that are lawful are allowed or permitted, like driving after you've gotten your driver's license or baking your neighbor a cake. Neither of these things is prohibited by law, so they're lawful. You have a lawful right to build a cabin on land you own, and it's also lawful to put up a fence. The adjective comes from law, which has an Old English root, lagu, "ordinance, rule, regulation, or a district governed by them."

Keep Reading on Vocabulary.com

Vocabulary lists containing lawful

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.

“In any other situation, however, school officials should be polite and extend common courtesy, but should not assist with or permit enforcement activities on school grounds not required by lawful order.”

From Los Angeles Times • May 1, 2026

"The defendant not only sought to obstruct the lawful execution of warrants by prosecutors and others," he said in his verdict.

From Barron's • Apr. 29, 2026

The tech titan’s deal with the Defense Department essentially allows AI to be used in all lawful scenarios, a person familiar with the matter said.

From The Wall Street Journal • Apr. 28, 2026

They claimed they had a lawful excuse, telling the court it was a peaceful protest and the damage was minor.

From BBC • Apr. 27, 2026

It presupposed a high level of military discipline and an awesome degree of obedience by subordinates to their lawful superiors It assumed that wars had a beginning and an end.

From "The Sense of Style" by Steven Pinker