What does "sixth" mean?

Sixth: Constituting or being one of six equal parts into which anything is divided.

Additional senses

  1. 2.The quotient of a unit divided by six; one of six equal parts which form a whole.
  2. 3.The next in order after the fifth.
  3. 4.(Mus.) The interval embracing six diatonic degrees of the scale.

Sources