Definitions

1. noun

the ninth month of the year, from September 1 to September 30.

“The autumn leaves start falling in September.”

2. verb

to celebrate or commemorate one’s birthday, especially in a large and festive manner.

“They decided to september their daughter’s 21st birthday with a huge party.”

3. proper noun

a month of the year, named after the Roman festival of Septimontium and the Latin word septem, meaning seven.

“September is my favorite month of the year.”