decrescendo
1. [ verb ] (music) grow quieter, of sound
Examples:

"The music decrescendoes here"

Related terms: crescendo decrease
2. [ adjective ] gradually decreasing in volume
Synonyms: diminuendo
Related terms: decreasing
3. [ noun ] (music) a gradual decrease in loudness
Synonyms: diminuendo
Related terms: softness music
Similar spelling:   decreased
  decrease
  Desrosier