共きょう同どう防ぼう衛えい

noun

joint defense; collective defense

Refers to a cooperative military or security arrangement where multiple parties agree to defend each other, often used in political and military contexts.

• 日にち米べい共きょう同どう防ぼう衛えい条じょう約やくに基もとづいて演えん習しゅうが行おこなわれた。

  Exercises were conducted under the Japan-U.S. joint defense treaty.

• 共きょう同どう防ぼう衛えいの枠わく組ぐみを強きょう化かする必ひつ要ようがある。

  It is necessary to strengthen the framework of collective defense.