Definitions

1. adjective

music: a note or tone above the tonic note in a key.

“The supertonic note in this song adds a unique touch to its melody.”

2. noun

music: a note or tone above the tonic note in a key.

“The supertonic of the key is used to create an interesting harmony.”

3. music

music: in sol-fa notation, the second note after the tonic.

“In sol-fa notation, the supertonic is the note after the tonic.”