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Jyutping gun3 ming4
Pinyin guàn míng

Definitions (Wiktionary)
  1. verb, of a company, often, usually
    to give a name to (an event, competition)

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Jyutping gun3 meng2
Pinyin guān míng

Definitions (粵典–words.hk)
  1. 動詞
    特設​名銜
    to be the title sponsor; to endow
    • 冠名贊助
      冠名赞助
      gun3 ming4 zaan3 zo6
      title sponsorship
    • 冠名講座教授
      冠名讲座教授
      gun3 ming4 gong2 zo6 gaau3 sau6
      endowed chairs

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Jyutping gun3 ming4
Pinyin guān míng

Definitions (粵典–words.hk)
  1. 動詞
    特設​名銜
    to be the title sponsor; to endow
    • 冠名贊助
      冠名赞助
      gun3 ming4 zaan3 zo6
      title sponsorship
    • 冠名講座教授
      冠名讲座教授
      gun3 ming4 gong2 zo6 gaau3 sau6
      endowed chairs
Examples (粵典–words.hk)
  1. Cantonese
    冠名赞助
    冠名贊助
    gun3 ming4 zaan3 zo6
    • title sponsorship
  2. Cantonese
    冠名讲座教授
    冠名講座教授
    gun3 ming4 gong2 zo6 gaau3 sau6
    • endowed chairs