in arms
Definition of in arms
—often used in the brother/sister/comrade in arms to indicate one has helped to fight an enemy especially in a war He and I were brothers in arms.
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Word by Word Definitions
armplay arms
: a human upper limb
: the part between the shoulder and the wrist
: something like or corresponding to an arm: such as
: to furnish or equip with weapons
: to furnish with something that strengthens or protects
: to equip or ready for action or operation
: a means (such as a weapon) of offense or defense
: firearm
: a combat branch (as of an army)
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