rallentando RAL-lin-TAHN-doe Your browser does not support the audio element. [ Italian ] Definition A directive to perform the indicated passage of a composition with a gradual slowing of the tempo. The abbreviation is rall. See more about tempo terminology in the Appendix. Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2016-06-07 01:55:21