in/at one fell swoop

phrase

: with a single, quick action or effort

The court has dismissed all of the charges against him in one fell swoop.

Browse Nearby Words

in a tight corner

in/at one fell swoop

in/at one go

Cite this Entry

Style

“In/at one fell swoop.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%2Fat%20one%20fell%20swoop. Accessed 13 Mar. 2026.

Copy Citation

Popular in Grammar & Usage

More Words You Always Have to Look Up

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Popular in Wordplay

in/at one fell swoop

phrase

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

immure

Popular in Grammar & Usage

More Words You Always Have to Look Up

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Popular in Wordplay

The Opposite of Déjà Vu

The Words of the Week - Mar. 13

Was 'nervous Nellie' a Real Person?

Why do we call it a 'flea market'?

17 Words for Dog Breeds

Popular

More Words You Always Have to Look Up

The Opposite of Déjà Vu

The Words of the Week - Mar. 13

Games & Quizzes