Definitions
1.nounAn instruction to play gradually more loudly, denoted by a long, narrow angle with its apex on the left ( < ), by musicians called a hairpin.
2.nounA gradual increase of anything, especially to a dramatic climax."Their fighting rose in a fearsome crescendo."
3.nounThe climax of a gradual increase."Their arguing rose to a fearsome crescendo."
4.verbTo increase in intensity; to reach or head for a crescendo."The band crescendoed and then suddenly went silent."
5.adverbGradually increasing in force or loudness.