This is the 7473rd most frequent Chinese word.
西门
"West Gate"
In this sentence, '西门' is used to refer to the west gate of a specific location, in this case, a school.
我在学校的西门等你。
I am waiting for you at the west gate of the school.
Here '西门' refers to the west gate area as a notable or distinct location.
西门的风景特别美丽。
The scenery at the west gate is particularly beautiful.
In this example, '西门' is used to identify a landmark by which directions are oriented.