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Jyutping daai6 joeng2
Pinyin dà yáng

Definitions (粵典–words.hk)
  1. 名詞、舊式
    中國​清末​民初​嘅​通用​貨幣​銀​圓​嘅​俗​稱​(​量​詞​:​個​)
    silver coin adopted in the late Qing Dynasty and the Republican period in China
  2. 名詞、舊式
    整數價​錢​嘅​戲​稱​,​一個​大洋​就​代表​一蚊​(​量​詞​:​個​)
    dollar
    • 去到見到件班戟,只係賣十個大洋。
      去到见到件班戟,只系卖十个大洋。
      heoi3 dou3 gin3 dou2 gin6 baan1 kik1, zi2 hai6 maai6 sap6 go3 daai6 joeng2.
      The pancake costs only 10 (Hong Kong) dollars.

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Jyutping daai6 joeng4
Pinyin dà yáng

Definitions (CC-CEDICT)
  1. ocean
  2. (old) silver dollar
Definitions (Wiktionary)
  1. noun, colloquial
    a specific currency unit, e.g. yuan
  2. noun
    silver dollar
  3. noun
    ocean; sea (as a whole)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    中国与美国隔着哪个大洋?
    中國與美國隔着哪個大洋?
    zhōng guó yǔ měi guó gé zhe nǎ ge dà yáng ?
    • Which ocean separates China and America?
  2. Mandarin
    澳大利亚是大洋洲最大的国家。
    澳大利亞是大洋洲最大的國家。
    ào dà lì yà shì dà yáng zhōu zuì dà de guó jiā 。
    • Australia is the largest country in Oceania.
Examples (粵典–words.hk)
  1. Cantonese
    去到见到件班戟,只系卖十个大洋。
    去到見到件班戟,只係賣十個大洋。
    heoi3 dou3 gin3 dou2 gin6 baan1 kik1, zi2 hai6 maai6 sap6 go3 daai6 joeng2.
    • The pancake costs only 10 (Hong Kong) dollars.
  2. Cantonese
    五大洋七大洲
    五大洋七大洲
    ng5 daai6 joeng4 cat1 daai6 zau1
    • the seven continents and the five oceans
Examples (Wiktionary)
  1. Mandarin
    一天氪金一千大洋?你可能是石乐志。
    一天氪金一千大洋?你可能是石樂志。
    yī tiān kè jīn yī qiān dà yáng ? nǐ kě néng shì shí lè zhì .
    • You spent 1,000 bucks on this game in a single day? You must be losing your mind.