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

  • lawfully adverb
  • lawfulness noun
  • prelawful adjective
  • prelawfully adverb
  • prelawfulness noun
  • quasi-lawful adjective
  • quasi-lawfully adverb

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.

According to Essayli, Mafi is "an Iranian national who became a lawful permanent resident of the United States in 2016".

From BBC • Apr. 20, 2026

They received lawful permanent residency in June 2016, Rubio said.

From Los Angeles Times • Apr. 11, 2026

So he tried again, this time describing his force as the “most professional in the world” and vowing it would “always strike lawful targets.”

From Salon • Apr. 11, 2026

“Compliance with a lawful order of a court is not optional; it is required in a democracy committed to the rule of law.”

From The Wall Street Journal • Apr. 10, 2026

"I am their lawful prince," Theon said stiffly.

From "A Clash of Kings" by George R.R. Martin