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Jyutping gau2 lau4
Pinyin jiǔ liú

Definitions (CC-CEDICT)
  1. the nine schools of thought, philosophical schools of the Spring and Autumn and Warring States Periods (770-220 BC), viz Confucians 儒家[Ru2 jia1], Daoists 道家[Dao4 jia1], Yin and Yang 陰陽家|阴阳家[Yin1 yang2 jia1], Legalists 法家[Fa3 jia1], Logicians 名家[Ming2 jia1], Mohists 墨家[Mo4 jia1], Diplomats 縱橫家|纵横家[Zong4 heng2 jia1], Miscellaneous 雜家|杂家[Za2 jia1], and Agriculturalists 農家|农家[Nong2 jia1]
Definitions (粵典–words.hk)
  1. 形容詞
    地位​低下​,​唔​重要​;​唔​入流
    low social status; unimportant
    • 啲九流藝人想借呢單新聞上位。
      啲九流艺人想借呢单新闻上位。
      di1 gau2 lau4 ngai6 jan4 soeng2 ze3 ni1 daan1 san1 man2 soeng5 wai2.
      Those unfamous artists want to gain publicity by this news.
  2. 反義詞
    一流
Definitions (Wiktionary)
  1. noun, archaic
    myriad tributaries
  2. noun, historical
    the Nine Schools of Pre-Qin Philosophy (namely, Confucianism, Daoism, School of Naturalists, Legalism, School of Names, Mohism, School of Diplomacy, School of Miscellany and Agriculturalism)
Examples (粵典–words.hk)
  1. Cantonese
    九流十家
    九流十家
    gau2 lau4 sap6 gaa1
    • the Nine / Ten Schools of Thought
  2. Cantonese
    九流
    九流
    • (lit.) ninth-rate; (fig.) poor in quality
  3. Cantonese
    啲九流艺人想借呢单新闻上位。
    啲九流藝人想借呢單新聞上位。
    di1 gau2 lau4 ngai6 jan4 soeng2 ze3 ni1 daan1 san1 man2 soeng5 wai2.
    • Those unfamous artists want to gain publicity by this news.