契姐 [－－]

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Definitions (粵典–words.hk)
  1. 名詞
    唔​係​真正​嘅​家​姐​，​雙方​冇​血緣關​係​；​兩個​年紀​唔​係​差​好​遠​嘅​人​，​因為​感情​好好​，​所以​就​結成​契​兄弟​姊妹​，​如果​年紀​比​較​大​嘅​係​女性​，​咁​後​生果​個​就​叫​佢​契​姐
    an older girl or woman treated as an older sister
Definitions (Kaifangcidian)
  1. 乾姐 – 干姐
  2. 義姐 – 义姐
  3. 乾姊 – 干姊
  4. 乾姊姊 – 干姊姊

契姐 [－－]

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Definitions (CC-CANTO)
  1. god sister [written and colloquial]