Crescendo

Cres-çĕn'do, a. [It., from It. & Lat. crescere, to increase.] (Mus.) With a constantly increasing volume of voice; with gradually increasing strength and fullness of tone;—a direction for the performance of music, indicated as in the cut, or the word being written on the score.

Cres-çĕn'do, n. [See CRESCENDO, a.] (Mus.) (a.) A gradual increase in the strength and fullness of tone with which a passage is performed. (b.) A passage to be performed with constantly increasing volume of tone.