A suspended chord is a chord in which the third is replaced or accompanied by either a fourth or a major second, although the fourth is far more common.
This type of sound is borrowed from the contrapuntal technique of suspension, where a note from a previous chord is carried over to the next chord, and then resolved down to the third or tonic, suspending a note from the previous chord. However, in a suspended chord the added tone does not necessarily resolve.
Suspended chords are most commonly found in folk music and popular music. (Courtesy of Wikipedia)
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