What is the definition of "timbre" in music?

Timbre refers to the unique quality or color of a musical sound, which allows us to distinguish different instruments or voices, even when they are playing the same pitch at the same volume. This characteristic is influenced by various factors, including the instrument's material, how it's played, and any additional effects applied to the sound. For example, a piano and a violin can play the same note, but the sound each produces is distinct due to their different timbres. Understanding timbre is fundamental in music appreciation, as it enhances the listening experience by revealing the richness and complexity of musical textures.