Gradually slackening in tempo; ritardando. Used chiefly as a direction.
A rallentando passage or movement.
(musical direction) Gradually slowing.
Origin of rallentando
- Italian present participle of rallentare to slow down re- intensive pref. (from Latin re–) allentare to slow down (from Late Latin allentāre) (Latin ad- ad-) (Latin lentus slow)
From American Heritage Dictionary of the English Language, 5th Edition