Diminuendo (pronounced dim-in-you-EN-doh) is a musical term that means gradually getting quieter. When you see this word in sheet music, it tells you to slowly decrease the volume as you play or sing, like turning down the dial on a radio bit by bit.

The word comes from Italian, the language musicians have used for centuries to write directions in their music. You might see it written out as diminuendo, or you might see the abbreviation dim., or even a long wedge shape that looks like a sideways V opening to the left: <

Imagine playing the final notes of a lullaby, letting each measure grow softer and softer until the sound almost disappears into silence. That's a diminuendo. Or picture an orchestra ending a symphony, with all the instruments gradually fading from forte (loud) to piano (soft) to pianissimo (very soft).

The opposite of diminuendo is crescendo, which means gradually getting louder. Musicians practice these gradual changes carefully because they create drama and emotion in music. A skilled performer can make a diminuendo feel like a sunset slowly fading, or a voice growing distant, or a whisper trailing away into nothing.