autumn · noun C or U /ˈɔː.təm/
autumn
A2 the season of the year between summer and winter, when leaves fall from the trees
Dictionary examples:
We like to travel in the autumn when there are fewer tourists.
Last autumn we went to Germany.
autumn colours/leaves
Learner example:
I'm happy, but this place is a little bit cold because we are in autumn. (Preliminary English Test; B1; Spanish)