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Jyutping zing3 sat1
Pinyin zhèng shǐ

Definitions (Wiktionary)
  1. noun, humorous
    lawfully wedded wife (as opposed to a mistress)
  2. noun, historical
    legal wife
  3. noun, historical
    eldest son born by one's legal wife

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Jyutping zing3 sat1
Pinyin zhèng shì

Definitions (CC-CEDICT)
  1. first wife
  2. legal wife
Definitions (粵典–words.hk)
  1. 名詞
    一夫多妻制​家庭​中​嘅​正式​妻室​,​喺​禮​制​上​同​丈夫​平等​。​通常​只有​一個​正室​,​其餘​地位​較​低​嘅​其他​妻子​稱為​側室​。​(​量​詞​:​個​)
    the legal wife; the senior wife
    • 佢嘅大仔唔係正室生嘅。
      佢嘅大仔唔系正室生嘅。
      keoi5 ge3 daai6 zai2 m4 hai6 zing3 sat1 saang1 ge3.
      His eldest son was not delivered by his legal wife.
  2. 近義詞
    大婆
  3. 反義詞
    側室
Examples (粵典–words.hk)
  1. Cantonese
    佢嘅大仔唔系正室生嘅。
    佢嘅大仔唔係正室生嘅。
    keoi5 ge3 daai6 zai2 m4 hai6 zing3 sat1 saang1 ge3.
    • His eldest son was not delivered by his legal wife.