WordReference Random House Unabridged Dictionary of American English © 2026
sin•gle-ac•tion
(sing′gəl ak′shən),USA pronunciation adj.
- Military(of a firearm) requiring the cocking of the hammer before firing each shot:a single-action revolver.
- 1850–55
'single-action' also found in these entries (note: many are not synonyms or translations):