Tishri Syllabification: (Tish·ri)Pronunciation: /ˈtiSHrē, -rā/ (also Tisri /ˈtiz-/)Definition of Tishri noun (in the Jewish calendar) the first month of the civil and seventh of the religious year, usually coinciding with parts of September and October. Origin:from Hebrew tišrīTishri in other Oxford dictionaries Definition of Tishri in the British & World English dictionary