ritardando

/R IY0 T AA1 R D AE1 N D OW0/
noun
  1. 1

    An instance of gradually decelerating the tempo of a piece of music.

adjective
  1. 1

    Having a gradually decelerating tempo.

adverb
  1. 1

    Gradually decelerating the tempo of a piece of music, especially at the end of the piece.

Antonyms

Source: https://en.wiktionary.org/wiki/ritardando