Dictionary.com
Thesaurus.com
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.

See Examples For:

Three of the five noncitizens charged so far are lawful permanent residents.

From The Wall Street Journal Aug. 17, 2026

In Byrd and Roberts’ case, the state insists it arose in seconds, during the same chaotic burst of gunfire that even the judge agrees began as lawful self-defense.

From Slate Aug. 11, 2026

“These databases and tracking devices are important tools for law enforcement to conduct lawful investigations,” Los Angeles County Dist.

From Los Angeles Times Aug. 4, 2026

"The United States is using its lawful authority to obtain the elimination of unreasonable acts, policies, and practices that burden US commerce," said Kush Desai, a White House spokesperson, in a statement.

From Barron's Aug. 3, 2026

It was not lawful in these matches to foin—that is, to make a thrust of the paint Finally there was swashbuckling.

From "The Once and Future King" by T. H. White

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training