English

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Alternative forms

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Etymology

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From anti- +‎ defense.

Adjective

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antidefense (not comparable)

  1. (military) Countering a defense system.
    • 1986 December, Bulletin of the Atomic Scientists, volume 42, number 10, page 52:
      The Soviet Union has already indicated that it may respond to deployment of a ballistic-missile defense system by deploying antidefense weapons, such as space mines to trail defense satellites.