rallentando

Gradually slackening in tempo; ritardando. Used chiefly as a direction.

A rallentando passage or movement.

In music, becoming slower; with decreasing rapidity. Also rallentato. Abbreviated rall. Compare ritardando and ritenuto.

Slackening; — a direction to perform a passage with a gradual decrease in time and force; ritardando.

slackening; becoming slower (used as a musical direction).

slowing down

gradually decreasing in tempo