Bois'ter-oŭs, a.
a. [O. Eng. boistous, D. byster, Dan. & Sw. bister, Icel. bistr, stormy, furious, O. & Prov. Eng. boist, a swelling, threat, Scot. boist and boast, to threaten. Cf. W. bwyst, wild, savage, wildness, ferocity, bwystus, ferocious. See BOAST and BISTER.]
Sense 1. Exhibiting tumultuous violence and fury; acting with noisy turbulence; violent; rough.
We see the water swell before a boisterous storm. Shak.
The boisterous force of violent men. Milton.
Sense 2. Involving or threatening violence; associated with violence; indicating or possessing might; strong; powerful. [Obs.] “Boisterous sword.” “Boisterous hand.” Shak. “Time makes the tender twig to boisterous tree to grow.” Turberville.
Sense 3. Noisy; rough; turbulent; as, boisterous mirth; boisterous behavior.
I like not that loud, boisterous man. Addison.
Sense 4. Vehement; excessive. [Rare.]
The heat becomes too powerful and boisterous for them. Woodward.
Synonyms—Loud; roaring; violent; stormy; turbulent; furious; tumultuous; noisy; impetuous; vehement.