noun
September
sehp-TEHM-buh
noun
1
The ninth month of the year, between August and October, marking the start of autumn in the Northern Hemisphere.
"School usually starts again in September."
"The weather begins to cool down in September."
How to Use September
Learner’s notesIn plain EnglishThe month that comes after August.
Memory tip
The name is a leftover from an older calendar — that's why "sept-" (seven) names a month that's now the ninth.
Trace the full origin ↓Word Forms
Septembers plural
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School usually starts again in _____.
Etymology
From Latin September, based on septem ("seven") — it was the seventh month in the old Roman calendar before January and February were added to the start of the year.