double action
The term "double action" is primarily associated with firearms but also applies to mechanisms in tools and devices where two tasks are performed in one motion.
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Definition
B2Firearms
(technical)A trigger mechanism that both cocks and releases the hammer with a single pull.
Example
- The revolver's double action allows for quicker firing in rapid succession.
C1Mechanics
(technical)A mechanism in which a single motion performs two tasks, such as in a pump or piston that works during both upward and downward strokes.
Example
- The double action pump is efficient because it moves fluid during both strokes.
Similar
Terms that have similar or relatively close meanings to "double action":
direct actionin actiondouble dealdual controldouble playdouble actone-two punch