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Jyutping jat1 jin4 wai4 ding6
Pinyin yī yán wéi dìng

Definitions (CC-CEDICT)
  1. (idiom) it's a deal
  2. that's settled then
Definitions (粵典–words.hk)
  1. 語句
    用​嚟​表示​一句​講好​咗​,​大家​都​唔​可以​改口​、​反悔
    "Promise!"; "That is settled!"; a phrase used to declare that a promise must be kept by everyone.
    • 你應承咗我要考到大學㗎,一言為定!
      你应承咗我要考到大学㗎,一言为定!
      nei5 jing1 sing4 zo2 ngo5 jiu3 haau2 dou2 daai6 hok6 gaa3, jat1 jin4 wai4 ding6!
      You have promised me you will get into university. You must keep this promise!
Definitions (Wiktionary)
  1. phrase, idiomatic
    that's settled then; it's a deal
    • 甲:咱們去卡拉OK吧。乙:好的,一言為定!
      甲:咱们去卡拉OK吧。乙:好的,一言为定!
      jiǎ : zán men qù kǎlāOK ba . yǐ : hǎo de , yī yán wèi dìng !
      A: Let's go to a karaoke bar. B: OK, it's a deal.
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    一言为定!
    一言為定!
    yī yán wéi dìng !
    • It's a deal!
Examples (粵典–words.hk)
  1. Cantonese
    你应承咗我要考到大学㗎,一言为定!
    你應承咗我要考到大學㗎,一言為定!
    nei5 jing1 sing4 zo2 ngo5 jiu3 haau2 dou2 daai6 hok6 gaa3, jat1 jin4 wai4 ding6!
    • You have promised me you will get into university. You must keep this promise!
Examples (Wiktionary)
  1. Mandarin
    甲:咱们去卡拉OK吧。乙:好的,一言为定!
    甲:咱們去卡拉OK吧。乙:好的,一言為定!
    jiǎ : zán men qù kǎlāOK ba . yǐ : hǎo de , yī yán wèi dìng !
    • A: Let's go to a karaoke bar. B: OK, it's a deal.