adv. phr. 1. literary In one attack or accident; in one bad blow. The millionaire lost his money and his friends at one fell swoop. 2. At one time; at the same time. Three cars drove into the driveway, and Mrs. Crane's dinner guests all arrived at one fell swoop.
AT ONE FELL SWOOP
Meaning of AT ONE FELL SWOOP in English
American idioms English vocabulary. Английский словарь американских идиом. 2012