Wiktionary
alt. 1 (context literal English) With a single blow, effort, or act. 2 (context figuratively by extension English) at once, immediately; in an instant. prep.phr. 1 (context literal English) With a single blow, effort, or act. 2 (context figuratively by extension English) at once, immediately; in an instant.
Usage examples of "at one stroke".
With a flourish, she drew her broadsword, severed the hawser at one stroke.
It showed in the number of U-boat sinkings - ninety of them were sent to the bottom during the first five months of the year: a single escort group on a single twenty-day cruise accounted for six at one stroke.
Gorulga could denounce the Cimmerian to the people, establish a reputation for integrity, and rid Thutmekri of his rival at one stroke.
And then Sir Launcelot was wroth, and up he gat upon his feet, and drew his sword, and he smote off the boar's head at one stroke.
From being a dangerous, dominant player in the Game of the Council, at one stroke Mara has become the single most powerful Ruling Lord or Lady in the history of the Empire.
It was a bold and brilliant plan which, if it succeeded, would bring to a close, at one stroke, the war with the Hyksos that had already raged through two lifetimes.
For a guide the chief chose the silver-headed old man, ridding himself of a useless mouth and an unwelcome visitor at one stroke.