From Longman Dictionary of Contemporary Englishin one fell swoopin one fell swoop (also at one fell swoop British English) doing a lot of things at the same time, using only one action SYN in one go A single company can close a factory, eliminating 74,000 jobs in one fell swoop. → fell
Examples from the Corpus
in one fell swoop• A single company can eliminate 74,000 jobs in one fell swoop.• Compton had not been laid out, like Lakewood, in one fell swoop.• Despite the drop-off, analysts said they were encouraged by the elimination of the securities in one fell swoop.• I think it might solve the whole problem in one fell swoop.• The most difficult thing afoot is to keep our problem child from blowing it in one fell swoop.• Can you imagine it, to have grown up insane and then in one fell swoop to achieve sanity? 