一旦

一旦 yīdàn

In a single day (in case - once)

What 一旦 means

  1. In a single day (in case - once)

These meanings come from the same dictionary that powers the Chinese to Pinyin translator and the Chinese to English translator, so a whole sentence containing 一旦 will read it the same way this page does.

Recognise a piece of 一旦 but not the character it belongs to? Pick the parts in the component character finder and it will name the character for you — free for every character, with nothing to sign in to.

Character by character

一旦 is written with 2 characters. Chinese words are usually easier to remember once you can see what each part contributes.

一
yī
One (single)
旦
dàn
Day (dawn)

How to write 一旦

Stroke order is not decoration — it is what makes handwriting legible and what dictionary lookup by stroke count depends on.

Practise 一旦 on printable 田字格 sheets, trace it in the writing practice tool, or watch any other character in the Stroke Order Animator.

一旦 in a sentence

一旦决定了就别后悔。
Yídàn juédìng le jiù bié hòuhuǐ.
Once you have decided, do not regret it.
一旦下雨,比赛就取消。
Yídàn xià yǔ, bǐsài jiù qǔxiāo.
If it rains, the match will be cancelled.

Every sentence on this site that uses 一旦 is collected on the 一旦 sentence page. Want pinyin above a sentence of your own? Paste it into the Pinyin Annotator.

Questions about 一旦

What does 一旦 mean in English?

一旦 is pronounced yīdàn and means In a single day (in case - once).

How do you pronounce 一旦?

一旦 is yīdàn in pinyin — written yidan without tone marks. Press the audio button on this page to hear it spoken by a native voice.

What are the characters in 一旦?

一旦 is written with 2 characters: 一 (yī) One (single), 旦 (dàn) Day (dawn). Knowing the parts is usually how the whole word becomes memorable.

Is 一旦 an HSK word?

Yes — 一旦 is on the official HSK 5 vocabulary list. You can study it with the rest of that list on the HSK 5 page.

Studied around the same time

Keep going

Translate a whole sentence containing 一旦 with the Chinese to Pinyin translator, study it alongside the rest of HSK 5, drill it with HSK flashcards, or save it above and review it on your review deck.

Browse the dictionary

Every word on this site links to its entry — tap any word in a graded reader, a translation result or an HSK list to land on a page like this one.

Dictionary index