(1):
(a.) Constituting or being one of nineteen equal parts into which anything is divided.
(2):
(n.) The quotient of a unit divided by nineteen; one of nineteen equal parts of anything.
(3):
(a.) Following the eighteenth and preceding the twentieth; coming after eighteen others.
(4):
(n.) The next in order after the eighteenth.
(5):
(n.) An interval of two octaves and a fifth.