tempestuosity noun2 •The quality of being tempestuous.TEMPESTUOSITY, [Tempestuositas, L.] Storminess. — 1721 •(rare) Someone or something that is tempestuous.Mr. Theodore Tilton’s first novel, ‘Tempest Tossed,’ (Sheldon) promises to be a very powerful work, of the Hugo school; some think that this radical tempestuosity has found his forte in fiction. — 1874 formstempestuosities