THIRTEENTH

noun the next in order after the twelfth.

2. thirteenth ·noun the interval comprising an octave and a sixth.

3. thirteenth ·adj constituting or being one of thirteen equal parts into which anything is divided.

4. thirteenth ·noun the quotient of a unit divided by thirteen; one of thirteen equal parts into which anything is divided.

5. thirteenth ·adj next in order after the twelfth; the third after the tenth;

— the ordinal of thirteen; as, the thirteenth day of the month.