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Definitions

defense

[dih-fens, dee-fens] / dɪˈfɛns, ˈdi fɛns /
NOUN
armament; protection system
Synonyms
STRONG
aegis armor arms barricade bastille bastion bulwark buttress citadel cover deterrence dike embankment fastness fence fort fortification fortress garrison guard hard shell immunity munitions palisade parapet position protection rampart redoubt resistance safeguard security shelter shield stockade stronghold trench wall ward warfare weaponry weapons
Antonyms
STRONG
harm hurt injury
WEAK
betrayal capitulation desertion flight surrender yielding
NOUN
explanation, justification
Synonyms
STRONG
answer apologetics apologia apology argument cleanup cop-out exculpation excuse exoneration extenuation jive plea rationalization rejoinder reply response retort return story vindication whitewash
WEAK
apologizing excusing explaining fish story off-time song and dance
Antonyms
STRONG
charge indictment question request
WEAK
betrayal capitulation desertion flight surrender yielding

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.

The funding has helped launch defense and aerospace startups across Southern California, including Costa Mesa autonomous weapons maker Anduril Industries, now valued at more than $30 billion.

From Los Angeles Times • Apr. 14, 2026

“The problem for these guys is they are that good,” a defense official told Axios.

From Slate • Apr. 14, 2026

US Defense Secretary Pete Hegseth announced Monday a "major" defense partnership with Indonesia following a meeting with the Southeast Asian nation's defense minister at the Pentagon.

From Barron's • Apr. 14, 2026

Artemis “captures the imagination,” according to Laura Rippy, managing partner at Alumni Ventures, which has investments in several space and defense companies.

From MarketWatch • Apr. 14, 2026

With a howling battle cry, teeth bared and fists raised, the Incorrigibles rushed to the defense of the babies by forming an Incorrigible pyramid in front of the cradle.

From "The Long-Lost Home" by Maryrose Wood

Vocabulary lists containing defense

Set, Hut! Football Vocabulary

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Defense, Dribble, and Dunk: Basketball Lingo

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Preamble to the U.S. Constitution (1787)

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!