arms treaty

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Also see: treaty

Concise Oxford English Dictionary © 2008 Oxford University Press:
arms/ɑːmz/

▶plural noun

• 1 weapons; armaments.

• 2 distinctive emblems originally borne on shields in battle and now forming heraldic insignia.

– phrases
a call to arms a call to make ready for fighting.
in arms prepared to fight.
under arms equipped and ready for war or battle.
up in arms protesting vigorously.

– origin ME: from OFr. armes, from L. arma.