Prŏs'per-oŭs, a.

a. [Lat. prosperus or prosper, originally, answering to hope, from pro, according to, and sperare, to hope; Pr. prosperos, Fr. prospère, Sp., Pg., & It. prospero.] 1. Tending or permitted to prosper; succeeding in the pursuit of any thing desirable; making gain or increase; thriving; successful; as, a prosperous voyage; a prosperous undertaking; a prosperous man, family, or nation; a prosperous war. By moderation either state to bear, Prosperous, or adverse. Milton. 2. Favorable; favoring success. “A happy passage and a prosperous wind.” Denham. Syn.—Fortunate; successful; flourishing; thriving; favorable; auspicious; lucky. See FORTUNATE.