Definitions
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門
gate; door; entrance; opening; portal (Classifier: 扇 m mn; 道 m c; 度 c; 條/条 c; 隻/只 c; 片 mn)
valve; switch
way of doing something; knack
門路/门路 ― ménlù ― way of doing something
family
school; sect; school of thought; tradition
佛門/佛门 ― fómén ― Buddhism
門生/门生 ― ménshēng ― disciple of a particular tradition
class; category
(taxonomy) phylum; division
(logic, electronics) logic gate
Classifier for lessons, subjects, branches of technology, and languages. ⇒ all nouns using this classifier
Classifier for livelihoods, trades, skills, businesses, etc.
這門生意不好做。 [MSC, trad.]
这门生意不好做。 [MSC, simp.]
Zhè mén shēngyì bùhǎo zuò. [Pinyin]
It's a tough business.
Classifier for thoughts, ideas, or emotions, particularly those forming a system or complex.
你這一門心思,誰猜得到? [MSC, trad.]
你这一门心思,谁猜得到? [MSC, simp.]
Nǐ zhè yī mén xīnsī, shéi cāidé dào? [Pinyin]
Who could have guessed all that in your mind?
Classifier for marriage, romantic, or family relations.
說成一門親事/说成一门亲事 ― shuō chéng yī mén qīnshì ― to successfully make a match
Classifier for large guns.
-gate (a suffix combined with keywords to form the names of scandals)
(anatomy) hilum of an organ
a surname
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