DESCANT

vi the upper voice in part music.

2. descant ·vi to sing a variation or accomplishment.

3. descant ·vi the canto, cantus, or soprano voice; the treble.

4. descant ·vi to comment freely; to discourse with fullness and particularity; to discourse at large.

5. descant ·vi a discourse formed on its theme, like variations on a musical air; a comment or comments.

6. descant ·vi originally, a double song; a melody or counterpoint sung above the plain song of the tenor; a variation of an air; a variation by ornament of the main subject or plain song.