self-defense

noun

self-de·​fense ˌself-di-ˈfen(t)s How to pronounce self-defense (audio)
1
: a plea of justification for the use of force or for homicide
2
: the act of defending oneself, one's property, or a close relative

Examples of self-defense in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The homicide figures do not include killings that occurred in self-defense or in other circumstances not measured in Chicago police statistics. Kori Rumore, Chicago Tribune, 27 May 2025 This framework was sustainable—both strategically and politically—as long as the U.S. military retained its dominance in the region, the threat from China was confined, and the potential contributions of U.S. allies were limited to their own self-defense. Ely Ratner, Foreign Affairs, 27 May 2025 Pointing a gun inevitably means firing a shot, and Ellie fires in self-defense, accidently killing both with one bullet. Dani Di Placido, Forbes.com, 26 May 2025 The girl's family asked for her identity to remain undisclosed, with the teenager hoping that her story will inspire women and other girls to learn self-defense skills that can save their lives. Peter Aitken, MSNBC Newsweek, 25 May 2025 See All Example Sentences for self-defense

Word History

First Known Use

1609, in the meaning defined at sense 2

Time Traveler
The first known use of self-defense was in 1609

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Cite this Entry

“Self-defense.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/self-defense. Accessed 3 Jun. 2025.

Kids Definition

self-defense

noun
self-de·​fense
ˌself-di-ˈfen(t)s
: the act of defending oneself, one's property, or a close relative

Legal Definition

self-defense

noun
self-de·​fense
ˈself-di-ˈfens
1
: the use of force to defend oneself
2
: an affirmative defense (as to a murder charge) alleging that the defendant used force necessarily to protect himself or herself because of a reasonable belief that the other party intended to inflict great bodily harm or death see also justification sense 2

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