(1):
(a.) First after the fifth; next in order after the fifth.
(2):
(a.) Constituting or being one of six equal parts into which anything is divided.
(3):
(n.) The quotient of a unit divided by six; one of six equal parts which form a whole.
(4):
(n.) The next in order after the fifth.
(5):
(n.) The interval embracing six diatonic degrees of the scale.