- a weapon, as a pistol or sword, carried at the side or in the belt.
Origin of side arm
First recorded in 1680–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for side arm
He didn't go to his cabin; didn't even take off his side-arm.Subspace Survivors
E. E. Smith
On one of these doors Leicester was hammering with his side-arm, the Portuguese standing by on the step below.The Adventures of Harry Revel
Sir Arthur Thomas Quiller-Couch
Dirk, dėrk, n. a Highland dagger or poniard: a side-arm worn by midshipmen and cadets of the royal navy.
Jack noticed that a Bavarian helmet and side-arm hung from the knapsack of one, a mere freckled lad, downy and dimpled.Lorraine
Robert W. Chambers
Others to the Old-German, Laz, from latus; the weapon being therefore a "side-arm."Ancient Armour and Weapons in Europe