門|もんmon[1]atamadaka (head-high)

1. noungate
   ２人ふたりの兵士へいしが、門もんのところで見張みはりをしていた。↗

   Two soldiers kept guard at the gate.
2. noun, noun (suffix)branch of learning based on the teachings of a single master; school
3. noun, noun (suffix), biologyphylum; division
4. countercounter for cannons

• Synonym門戸もんこWrittenWritten/formal prose. A doorway or entrance, though used mostly figuratively, as in 「門戸を開放する」 (open one's doors to others).
• SynonymゲートNeutralNeutral. A loanword for gates such as boarding gates and floodgates, as in 「搭乗ゲート」; it also forms names for scandals, as in 「〜ゲート」.
• Synonym扉とびらNeutralNeutral. A hinged door panel, also the title page of a book; used in both speech and writing. It does not refer to the whole yard gate.
• Related入り口いりぐちNeutralNeutral. The place where you go in, not necessarily a door — 「駅の入り口」. For the way out, say 「出口」.
• Related玄関げんかんNeutralNeutral. The formal entrance and entryway of a house or building, part of the building itself; 「門」 is the gate in a wall or around a yard.
• Related戸とNeutralNeutral. A door panel of a house — sliding doors, plank doors and the like; 「門」 is the gate of a wall or yard, not the door itself.
• Related出入り口でいりぐちNeutralNeutral. A place you both enter and leave through, stressing two-way passage, as in 「非常出入り口」; 「入り口」 covers only going in.
• Related戸口とぐちWrittenWritten/formal prose for a house's doorway; read as 「ここう」, it means the number of households and population.
• Related門口かどぐちWrittenWritten/formal prose with an old-fashioned air: the stretch from the gate to the house door, or the beginning of something.
• Relatedとば口とばくちCasualColloquial. An entrance, or the very start of something, as in 「とば口に立つ」.
• Related開き戸ひらきどNeutralNeutral. A door that opens on hinges, defined by how it opens, as opposed to a sliding 「引き戸」.
• Related枢とぼそWrittenWritten/formal prose and archaic: the pivot socket in a door frame, extended to mean the door itself; seen in classical texts and architectural terms.

Use 「門」 for the gate in a wall or around a yard. For house doors say 「戸」 or 「扉」, for a home's entryway 「玄関」, for entrances 「入り口」, for two-way exits 「出入り口」, and for boarding gates 「ゲート」. 「扉」 also covers book title pages; 「門戸」 is figurative in formal prose.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （モン）ある囲かこった土地とちの外縁がいえんにあって、人ひと他ほかの出入でいりをする場所ばしょであり、場合ばあいによっては閉とざすことができるもの。
2. 民家みんか。
3. 家庭かてい。
4. （モン）生物せいぶつの分類ぶんるいの一ひとつ。界さかい-門もん-綱つな-目め-科か-（族ぞく）-属ぞく-（節ふし）-種しゅ
5. 大砲たいほうの数かずを表あらわす助数詞じょすうし。