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 older brother began preparing to fight in self-defense. Angie Leventis Lourgos, Chicago Tribune, 17 May 2025 Lawyers for the Harris County traffic cop said missteps by an officer prior to an escalating event do not strip them of the right to self-defense thereafter. Maureen Groppe, USA Today, 16 May 2025 Guns, on the one hand, make violent crime much more deadly, but at the same time, can also be used for self-defense against crime. Jens Ludwig, Time, 15 May 2025 The vessel, decommissioned in 2003, now serves as a self-defense test ship for experimental Navy weapons. Mandy Taheri, MSNBC Newsweek, 14 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

Browse Nearby Words

Cite this Entry

“Self-defense.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/self-defense. Accessed 20 May. 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

More from Merriam-Webster on self-defense

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