NOUN (1)

1. (music) a gradual increase in loudness;


VERB (1)

1. grow louder;
- Example: "The music crescendoes here"


ADJECTIVE (1)

1. gradually increasing in volume;

The Collaborative International Dictionary of English v.0.48:

Crescendo \Cres*cen"do\ (kr?s-s?n"d?; It. kr?-sh?n"d?), a. &
   adv. [It., from crescere to increase. See Crescent.] (Mus.)
   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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crescendo \Cres*cen"do\, n. (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.
       [1913 Webster]

WordNet (r) 3.0 (2006):

crescendo
    adj 1: gradually increasing in volume
    n 1: (music) a gradual increase in loudness
    v 1: grow louder; "The music crescendoes here" [ant:
         decrescendo]