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Jyutping ngaa4 mun4
Pinyin yá mén

Definitions (Wiktionary)
  1. noun, historical
    yamen
  2. noun, Dungan
    office; bureau

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Jyutping ngaa4 mun2
Pinyin yá men

Definitions (粵典–words.hk)
  1. 名詞、舊式
    舊時​對​政府​機構​、​或​官吏​辦公建築​物​嘅​稱​呼​,​又​稱​「​牙門​」
    an old naming of government institutes, or buildings of civil service
    • 鐵打衙門流水官
      铁打衙门流水官
      tit3 daa2 ngaa4 mun2 lau4 seoi2 gun1
      The same old institute, with often substituting officers (lit. iron made government institute, running water officers)

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Jyutping ngaa4 mun4
Pinyin yá men

Definitions (CC-CEDICT)
  1. government office in feudal China
  2. yamen
Definitions (Wiktionary)
  1. noun, historical
    yamen
  2. noun, Dungan
    office; bureau
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    铁打衙门流水官
    鐵打衙門流水官
    tit3 daa2 ngaa4 mun2 lau4 seoi2 gun1
    • The same old institute, with often substituting officers (lit. iron made government institute, running water officers)