Designating a firearm whose trigger serves to fire the weapon but not to cock it.
Webster's New World
Single-action Sentence Examples
The basis of the new system, which was almost entirely Field's work, was the abolition of the existing distinction in forms of procedure between suits in law and equity requiring separate actions, and their unification and simplification in a single action.
If any single action is due to free will, then not a single historical law can exist, nor any conception of historical events.
I came to the Western recently, sort of as an accident after getting involved in single-action revolver shooting.
Weapon No 241 Pistol Single Shot.410 inch Caliber This Belgian single action pistol has a smoothbore barrel.