- Next in order after the twelfth; the third after the
tenth; -- the ordinal of thirteen; as, the thirteenth day of the month. - Constituting or being one of thirteen equal parts into
which anything is divided.
2 . Thirteenth
[ n.]
- The quotient of a unit divided by thirteen; one of
thirteen equal parts into which anything is divided. - The next in order after the twelfth. - The interval comprising an octave and a sixth.