What does the word thirtieth mean?

Usage examples for thirtieth

  1. Now, where you are, in your thirtieth year, you ought to be able to get at it. – Pelle the Conqueror, Vol. 2 by Martin Anderson Nexo
  2. In the three- and- thirtieth year after Theodosius, it was translated by Symmachus, under the Emperor Severus. – Selections from the Table Talk of Martin Luther by Martin Luther