blus·ter / ˈbləstər/ • v. [intr.] talk in a loud, aggressive, or indignant way with little effect: you threaten and bluster, but won't carry it through. ∎  (of a storm, wind, or rain) blow or beat fiercely and noisily: a winter gale blustered against the sides of the house. • n. loud, aggressive, or indignant talk with little effect: their threats contained a measure of bluster.DERIVATIVES: blus·ter·er n.

bluster XV. ult. imit.; cf. LG. blustern, blistern flutter.