noun
A physical gate, entrance, or doorway, often at a building, garden, or city wall.
寺の門をくぐる。
I pass through the temple gate.
門の前に車を止めないでください。
Please don't park in front of the gate.
noun, noun, used as a suffix
school (of thought); branch of learning
A school, sect, or tradition of learning based on the teachings of a single master. Often used as a suffix.
彼は孔子の門に入った。
He entered the school of Confucius.
この流派はいくつかの門に分かれている。
This school is divided into several branches.
noun, noun, used as a suffix
phylum; division (biology)
Biological taxonomic rank: phylum (animals) or division (plants).
脊椎動物門には哺乳類や鳥類が含まれる。
The phylum Chordata includes mammals and birds.
counter
counter for cannons
Rare counter used specifically for cannons. Not used in everyday counting.
城には十門の大砲が備えられていた。
The castle was equipped with ten cannons.