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Jyutping duk1 ding6
Pinyin dǔ dìng

Definitions (CC-CEDICT)
  1. certain
  2. confident (of some outcome)
  3. calm and unhurried
Definitions (粵典–words.hk)
  1. 動詞
    因為​有把握​而​唔​緊張​,​好淡定
    to be calm; to be confident
    • 臨近放榜,佢依然非常之篤定。
      临近放榜,佢依然非常之笃定。
      The publication of public exam results comes soon, but he is still calm and confident.
  2. 動詞
    情況​幾乎​一定​會​發生
    to be sure
    • 呢位候選人篤定當選特首。
      呢位候选人笃定当选特首。
      It is sure that he will become the next Chief Executive after the election.
Definitions (Wiktionary)
  1. adj, dialectal
    certain
  2. adj, dialectal
    calm; serene
  3. verb, dialectal
    to be certain that; to be confident that
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    临近放榜,佢依然非常之笃定。
    臨近放榜,佢依然非常之篤定。
    • The publication of public exam results comes soon, but he is still calm and confident.
  2. Cantonese
    呢位候选人笃定当选特首。
    呢位候選人篤定當選特首。
    • It is sure that he will become the next Chief Executive after the election.