What is a chord?

A chord is defined as a combination of three or more notes played simultaneously. This definition encompasses various types of chords, such as triads (which consist of three notes), seventh chords (which consist of four notes), and extended chords (which may include even more notes). The essential characteristic of a chord is the simultaneous sounding of these notes, creating harmony and depth in music.

While it is true that combinations of two notes can form intervals, which are also important in music theory, they do not meet the criteria for being classified as a chord under the standard definition. Additionally, a single note played alone is merely an individual pitch, and a specific rhythmic pattern pertains to temporal organization in music but does not relate to harmony or chord structure. This highlights the importance of understanding the definition of a chord within the context of musical composition and harmony.