Webster's Revised Unabridged Dictionary · 1913

Swoop

Swoop , transitive verb

[Old English swopen, usually, to sweep, As. swāpan to sweep, to rush; akin to German schweifen to rove, to ramble, to curve, Old High German sweifan to whirl, Icelandic sveipa to sweep; also to Anglo-Saxon swīfan to move quickly. Compare Sweep, Swift, a. & n., Swipe, Swivel.]

1.
To fall on at once and seize; to catch while on the wing; as, a hawk swoops a chicken.
2.
To seize; to catch up; to take with a sweep.
And now at last you came to swoop it all. — Dryden
The grazing ox which swoops it [the medicinal herb] in with the common grass. — Glanvill

Swoop , intransitive verb

1.
To descend with closed wings from a height upon prey, as a hawk; to stoop.
2.
To pass with pomp; to sweep. [Obsolete] — Drayton

Swoop , noun

A falling on and seizing, as the prey of a rapacious bird; the act of swooping.
The eagle fell,... and carried away a whole litter of cubs at a swoop. — L'Estrange