"Autumn" is the Engpsh word used to describe the season that comes after summer and before winter.
The word autumn comes from the Latin word "autumnus" which was originally used to describe the harvest season in ancient Rome.

Here are some examples of how "autumn" is used in Engpsh sentences:

"The leaves on the trees change color in the autumn." (秋天树上的叶子会变颜色。)
"Autumn is my favorite season because of the cool weather and pumpkin everything." (秋天是我最喜欢的季节，因为天气凉爽，还有南瓜的一切。)
"The autumn air is crisp and refreshing." (秋天的空气清新清爽。)