Souse, v. i. [Probably fr. OF. sors, p. p. of sordre to rise, and first used of an upward swood, then of a swoop in general, but also confused with Souse, v. t. See Source.] To swoop or plunge, as a bird upon its prey; to fall suddenly; to rush with speed; to make a sudden attack.
For then I viewed his plunge and souse
Into the foamy main. Marston.
Jove's bird will souse upon the timorous hare. J. Dryden. Jr.