at one blast

Adverb

at one blast (not comparable)

1. (figuratively) At once, at the same moment in time.
   • For when Men ſhall obſerve the Nature of the Gun-Powder Treaſon, that it aymed at no leſs than the Deſtruction of the whole State at one blaſte; that the Contrivers were all Papiſts; that the pryme Hope of their Support was in the Engliſh Forces that ſerved the Archdukes, for which divers Captains...1606 February 5, [Edmund Sawyer], “From the Earl of Salisbury to Sir Charles Cornwallis”, in Memorials of Affairs of State in the Reigns of Q. Elizabeth and K. James I. Collected (Chiefly) from the...
   • [W]e can't without wonder remember that horrid Invention projected in this place, but thanks be to God diſappointed, wherein there was not Reverence to the ſacred Bones of Princes, but all were at one blaſt to be offer'd up to Moloch.1706, [John Rushworth], “The Speaker’s Speech to the King [marginal note]”, in Historical Collections from the Year 1638. to the Year 1641. Abridg’d and Improv’d. … With a Particular and More...
2. (literally) With one firing of a cannon or firearm; especially one whose ammunition is shotgun shot or grape shot, such that the multiple pieces of shot from one firing hit multiple birds or multiple soldiers.
   • Cannon, charged with grape, laid the men as flat as a pavement, exactly as a mighty wind levels standing grain at one blast.1898, Henryk Sienkiewicz, translated by Samuel Augustus Binion, Pan Michael (Pan Volodiyovski): A Historical Tale

   Synonyms:

   all at once, simultaneously