Thirteenth

Part of speech: noun (n.)

1. The quotient of a unit divided by thirteen; one of thirteen equal parts into which anything is divided.

2. The next in order after the twelfth.

3. The interval comprising an octave and a sixth.

Part of speech: adjective (a.)

1. Next in order after the twelfth; the third after the tenth; -- the ordinal of thirteen; as, the thirteenth day of the month.

2. Constituting or being one of thirteen equal parts into which anything is divided.