Crescendo
Crescendo (kr?s-s?n"d?; It. kr?-sh?n"d?) , adjective and adverb
[Italian, from crescere to increase. See Crescent.]
(Music) With a constantly increasing volume of voice; with gradually increasing strength and fullness of tone; -- a direction for the performance of music, indicated by the mark, or by writing the word on the score.
Crescendo , noun
(a)
(Music) A gradual increase in the strength and fullness of tone with which a passage is performed.
(b)
(Music) A passage to be performed with constantly increasing volume of tone.