A major
noun
High School
1
The major key with A as its tonic, with the notes A, B, C♯, D, E, F♯, and G♯, the key signature of which has three sharps.
2
The major chord with a root of A.
The major key with A as its tonic, with the notes A, B, C♯, D, E, F♯, and G♯, the key signature of which has three sharps.
The major chord with a root of A.