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Jyutping gwong1 ming4 zing3 daai6
Pinyin guāng míng zhèng dà

Definitions (CC-CEDICT)
  1. (of a person) honorable
  2. not devious
  3. (of a behavior) fair and aboveboard
  4. without tricks
  5. openly
  6. (of a situation) out in the open
Definitions (粵典–words.hk)
  1. 形容詞
    胸懷​坦白​,​言行​正派​,​行得​正​企得​正
    just and honourable
  2. 近義詞
    光明磊落
Definitions (Wiktionary)
  1. phrase, idiomatic
    high-principled; open and aboveboard; just and honorable; frank and righteous; without artifice
    (syn.) 光明磊落, 正大光明
    • 改革是公共大眾的事,改革是光明正大的事,不能只在少數精英貴族中討論,不能靜悄悄地進行,更不能在那裏搞什麼暗箱操作。
      改革是公共大众的事,改革是光明正大的事,不能只在少数精英贵族中讨论,不能静悄悄地进行,更不能在那里搞什么暗箱操作。
      gǎi gé shì gōng gòng dà zhòng de shì , gǎi gé shì guāng míng zhèng dà de shì , bù néng zhǐ zài shǎo shù jīng yīng guì zú zhōng tǎo lùn , bù néng jìng qiāo qiāo de jìn xíng , gèng bù néng zài nà lǐ gǎo shén me àn xiāng cāo zuò .
      Reform is a public affair for the masses. Reform is an open and aboveboard affair. It should not merely be discussed among a small number of the best and brightest of the aristocracy. It should not be carried out in a "hush-hush" manner, much less behind closed doors.
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    做嘢要光明正大,唔好偷偷摸摸。
    做嘢要光明正大,唔好偷偷摸摸。
    zou6 je5 jiu3 gwong1 ming4 zing3 daai6, m4 hou2 tau1 tau1 mo1 mo1.
    • Don't be surreptitious, we should play fair and square.
Examples (Wiktionary)
  1. Mandarin
    改革是公共大众的事,改革是光明正大的事,不能只在少数精英贵族中讨论,不能静悄悄地进行,更不能在那里搞什么暗箱操作。
    改革是公共大眾的事,改革是光明正大的事,不能只在少數精英貴族中討論,不能靜悄悄地進行,更不能在那裏搞什麼暗箱操作。
    gǎi gé shì gōng gòng dà zhòng de shì , gǎi gé shì guāng míng zhèng dà de shì , bù néng zhǐ zài shǎo shù jīng yīng guì zú zhōng tǎo lùn , bù néng jìng qiāo qiāo de jìn xíng , gèng bù néng zài nà lǐ gǎo shén me àn xiāng cāo zuò .
    • Reform is a public affair for the masses. Reform is an open and aboveboard affair. It should not merely be discussed among a small number of the best and brightest of the aristocracy. It should not be carried out in a "hush-hush" manner, much less behind closed doors.