In music, a major seventh chord is a seventh chord where the "third" note is a major third above the root, and the "seventh" note is a major seventh above the root (a fifth above the third note) . The major seventh chord, sometimes also called a Delta chord, can be written as maj7, M7, , ⑦ etc.
N（名词）
a chord much used in modern music, esp jazz and pop, consisting of a major triad with an added major seventh above the root 大七度; 用于现代爵士乐和流行乐中的和弦 (Often shortened to major seventh) → compare minor seventh chord