SEPTEMBER

abbreviation Sept [noun] - the ninth month of the year, after August and before October23(rd) September/September 23(rd)/23(rd) Sept/Sept 23(rd) [U]We're leaving for France on September the ninth/the ninth of September/(US) September ninth. [U]Claudia started school last September/is starting school next September. [U]My mother's birthday is in September. [U]We went to Greece two Septembers ago. [C]