noun an interval comprising two octaves and a second.
2. sixteenth ·adj sixth after the tenth; next in order after the fifteenth.
3. sixteenth ·noun the next in order after the fifteenth; the sixth after the tenth.
4. sixteenth ·adj constituting or being one of sixteen equal parts into which anything is divided.
5. sixteenth ·noun the quotient of a unit divided by sixteen; one of sixteen equal parts of one whole.