(1):

(n.) An interval comprising two octaves and a second.

(2):

(a.) Sixth after the tenth; next in order after the fifteenth.

(3):

(a.) Constituting or being one of sixteen equal parts into which anything is divided.

(4):

(n.) The quotient of a unit divided by sixteen; one of sixteen equal parts of one whole.

(5):

(n.) The next in order after the fifteenth; the sixth after the tenth.