Webster’s Revised Unabridged Dictionary · 1913 Rinforzando Rin′for·zan′do (rĭn′fôr·tsän′dō), a. [It., fr. rinforzare to reënforce, strengthen.] (Mus.) Increasing; strengthening; — a direction indicating a sudden increase of force (abbreviated rf., rfz.) Cf. Forzando, and Sforzando. ‹ Rined Ring ›