What does m in Cm mean in music Minor or Major?

In music, the "m" in "Cm" stands for "minor," indicating that the chord is a C minor chord. This means it consists of the notes C, E♭, and G, creating a darker and more somber sound compared to its major counterpart, C major, which has an E natural instead of E♭. Thus, "Cm" specifically denotes the minor quality of the chord.