(1):

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

(2):

(n.) The next in order after the sixteenth; one coming after sixteen others.

(3):

(a.) Next in order after the sixteenth; coming after sixteen others.

(4):

(n.) An interval of two octaves and a third.

(5):

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