Fetching details from the dictionary...

gate
branch of learning based on the teachings of a single master
division; phylum
counter for cannons
学校の門の前で友達と待ち合わせた。
I met my friend in front of the school gate.
門が閉まる前に急いで入った。
I hurried in before the gate closed.
お寺の門をくぐると静かな庭が広がっていた。
When I passed through the temple gate, a quiet garden spread out.