october
n. C / Un. the tenth month of the year. It comes after September and before November, and it has 31 days.
n. the tenth month of the Gregorian calendar, consisting of 31 days. When used as a modifier before another noun, it typically functions attributively.
The leaves turn brown in October.
We are planning a short hiking trip in the mountains during the second week of October.
The festival is traditionally held in late October to coincide with the harvest, drawing thousands of visitors to the rural valley each year.
From Middle English, borrowed from Old French octobre, from Latin Octōber (“eighth month”), from Latin octō (“eight”), from Proto-Indo-European *oḱtṓw (“twice four”); + Latin -ber, from -bris, an adjectival suffix; October was the eighth month in the Roman calendar.
Always capitalised. Functions as an uncountable mass of time, but can be countable when referring to specific instances in different years ('the Octobers of my childhood').