What does "smorzando" signify in musical expression?

"Smorzando" signifies a gradual diminishing in both tone and speed, which aligns with the chosen answer. This term instructs the musician to not only reduce the volume of the music but also to slow down the tempo as the music progresses toward the end of a phrase or section. It creates an expressive effect that conveys a sense of fading away, making it a poignant addition to expressive playing and interpretation.

In a performance context, following the direction of "smorzando" enhances the emotional impact of the music, allowing the listener to feel a sense of conclusion or introspection. It is often used at the end of a piece or a musical passage to signify a soft, gentle ending.