| adv. | 1. | (Mus.) In a gradually diminishing manner; with abatement of tone; decrescendo; - expressed on the staff by Dim., or Dimin., or the sign. |
| Noun | 1. | diminuendo - (music) a gradual decrease in loudness Synonyms: decrescendo |
| Adj. | 1. | diminuendo - gradually decreasing in volume Synonyms: decrescendo |