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common defense is not in our dictionary (yet). Here's what it could mean:

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Results generated using artificial intelligence.

noun

  • The coordinated protection of a nation, or a group of allied states, against external threats, typically through military power and shared security arrangements.

Example Sentences

Examples are provided to illustrate usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In Munich on Friday and Saturday, Rubio is expected to keep pushing Europe to share the burden, especially on matters of common defense.

From Barron's • Feb. 12, 2026

If so, Schlafen proteins may represent a common defense mechanism against both external enemies like viruses and bacteria as well as internal ones such as TEs.

From Science Daily • Oct. 2, 2023

Thesaurus

Possible Synonyms

  • national security
  • mutual protection
  • military alliance
  • shield of the state
  • joint protection

Possible Antonyms

Words in our thesaurus

other words

  • unilateralism
  • every nation for itself
  • non-interventionism
  • individual armament
  • splintered security

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