A minor chord is a type of musical chord that creates a somber or melancholic sound. It is formed by combining three specific notes: the root note, the minor third, and the perfect fifth. For example, in the case of the A minor chord, the notes are A, C, and E. Minor chords are commonly used in various music genres, including classical, rock, and pop. They often evoke feelings of sadness or introspection, making them a popular choice for emotional songs. Understanding minor chords is essential for musicians and composers when creating mood and atmosphere in their music.