Augmented chords are chords built from two stacked major thirds, creating an augmented fifth above the root of the chord. Another way to think of it would be having a major chord with a raised fifth. The chord symbol for and augmented chord is usually a plus sign (+) or “aug” added after the chord letter name, for example, C+ or Caug.
Augmented chords can resolve in several ways. The following examples show augmented chords used in various chord progressions.