september
n. C / Un. the ninth month of the year. It comes after August and before October.
n. the ninth month of the Gregorian calendar, consisting of 30 days.
The new school year starts in September.
Many families take their final summer trips in early September before the autumn weather arrives.
September marks the transition from summer to autumn in the northern hemisphere, often bringing cooler temperatures and shorter daylight hours.
PIE word *septḿ̥ Etymology tree Proto-Afroasiatic *sṗɣ? Proto-Semitic *šabʕ-bor.? Proto-Indo-European *septḿ̥ Proto-Italic *septəm Latin septem Latin September Old French septembreder. Old English Middle English English September From Middle English, from late Old English, from Old French septembre, Latin September (“seventh month”), from septem (“seven”), from Proto-Indo-European *septḿ̥ (“seven”); + Latin -ber, from -bris, an adjectival suffix; September was the seventh month in the Roman calendar.
Always capitalized. Usually uncountable, but can be countable when referring to a specific instance of the month in a particular year.