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Jyutping lau4 tong4
Pinyin liú táng

Definitions (CC-CEDICT)
  1. to stay behind (after class)
  2. to be given detention
  3. detention
Definitions (CC-CANTO)
  1. (verb) Put in detention
Definitions (粵典–words.hk)
  1. 動詞
    喺​返​學​時​間​以外​留​低​喺​學​校​,​通常​係​指​被​懲罰​,​要額​外​做功​課​或者​上額​外​嘅​課​堂
    to be detained after school, usu. as a means of punishment for misbehaviour
    • 佢唔交功課,要放學留堂。
      佢唔交功课,要放学留堂。
      keoi5 m4 gaau1 gung1 fo3, jiu3 fong3 hok6 lau4 tong4.
      He did not hand in any homework, and is to be detained after class.
Definitions (Wiktionary)
  1. verb, Cantonese
    to be kept in school to serve one's detention
Examples (粵典–words.hk)
  1. Cantonese
    留堂
    留堂
    lau4 tong4
    • to be kept in detention after school
  2. Cantonese
    佢唔交功课,要放学留堂。
    佢唔交功課,要放學留堂。
    keoi5 m4 gaau1 gung1 fo3, jiu3 fong3 hok6 lau4 tong4.
    • He did not hand in any homework, and is to be detained after class.
  3. Cantonese
    老师同学生讲:「你哋如果冇人认边个上堂讲粗口,我就有杀错,冇放过,将你哋成班都留堂!」
    老師同學生講:「你哋如果冇人認邊個上堂講粗口,我就有殺錯,冇放過,將你哋成班都留堂!」
    • '' If none of you admit to swearing in class, all of you will have detention today. Better reckless than sorry, isn't it?'' said the teacher to students.
  4. Cantonese
    你哋罚留堂又一齐,迟到又一齐,真系一对难兄难弟。
    你哋罰留堂又一齊,遲到又一齊,真係一對難兄難弟。
    nei5 dei6 fat6 lau4 tong4 jau6 jat1 cai4, ci4 dou3 jau6 jat1 cai4, zan1 hai6 jat1 deoi3 naan4 hing1 naan4 dai6.
    • You two are not only having detention together, but also came late together -- you are really two of a kind.