# Oui Meaning — “Yes” in French, and the Second Yes Nobody Teaches

> **Oui** (pronounced “wee”) means “yes” in French. French also has a second yes — **si** — used only to contradict a negative question: *“Tu ne viens pas ?” “Si !”* (“Aren’t you coming?” “Yes I am!”)

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Updated: 2026-09-07

## How the spelling works

Oui looks like three vowels and sounds like one syllable. The ou makes a “w” glide and the i supplies the vowel: “wee”. There is no “oo-ee”, and definitely no “oh-you-eye”.

| French | Say it | Register |
|---|---|---|
| oui | wee | yes — standard, works everywhere |
| ouais | weh | yeah — casual, very common in speech |
| mais oui | meh WEE | “why yes”, “of course” — mildly emphatic |
| bien sûr | byan SEWR | of course — the polite emphatic yes |
| tout à fait | too tah FEH | absolutely / exactly — confident agreement |
| volontiers | vo-lohn-TYAY | gladly — yes to an offer |
| d’accord | dah-KOR | OK / agreed — yes to a plan |

**Ouais is not rude, but it is casual** — Roughly where “yeah” sits in English. Fine with friends and completely normal in everyday speech; reach for oui in an interview, at a counter, or with anyone you address as vous.

## Si — the yes that argues back

When a question or statement is negative, French will not let you answer with oui. You need si. English has no equivalent, which is why it stays invisible to learners for years.

| They say | You mean | You say |
|---|---|---|
| Tu viens ? (Are you coming?) | Yes | Oui. |
| Tu ne viens pas ? (Aren’t you coming?) | Yes, I am | Si ! |
| Tu n’aimes pas ça ? (You don’t like it?) | Yes, I do | Si, j’adore. |
| Il n’est pas prêt. (He isn’t ready.) | Yes he is | Si, il est prêt. |

**Answering oui to a negative question confuses people** — It leaves the listener genuinely unsure which way you meant it — the same ambiguity English has with “Yes” to “You don’t mind?”. Si removes all doubt: it means “no, you’re wrong, and here is the positive version”.

Do not confuse this si with the other one meaning “if” (si tu veux, “if you want”). Same spelling, entirely different job — context makes it obvious.

## Oui oui, and why it makes English speakers smile

Doubling it — oui oui — is perfectly normal French for a slightly impatient or reassuring “yes, yes”. It is not the comedy phrase English speakers hear; it is just emphasis, or mild “yes, I know”.

It is also, in France, the name of Enid Blyton’s Noddy: Oui-Oui. Generations of French children grew up with him, which is why the phrase carries a faint nursery echo there rather than an accent joke.

## If you were looking for something else

“OUI” is also a technical acronym: the Organizationally Unique Identifier, the first three bytes of a MAC address that identify the hardware manufacturer. If you arrived here from a network lookup, that is a different OUI entirely.

It is likewise a yogurt brand, a perfume, and part of the French rail booking service’s name (SNCF Connect, formerly OUI.sncf). The French word is unrelated to all of them beyond the borrowing.

## FAQ

### What does oui mean?

Yes. It is the standard French word for yes, appropriate in every situation from casual chat to formal conversation.

### How do you pronounce oui?

“Wee” — one syllable. The ou makes a “w” sound and the i gives the vowel. There is no separate “o” sound.

### What is the difference between oui and si?

Both mean yes, but si is used only to contradict a negative question or statement. “Aren’t you coming?” takes Si ! to mean “yes, I am”.

### What does ouais mean?

“Yeah.” It is the casual, spoken form of oui — extremely common among friends, but too informal for a formal or professional setting.

### What does mais oui mean?

Literally “but yes”, used the way English says “why yes” or “of course”. It can sound warm and reassuring, or lightly impatient, depending on tone.

### Is it rude to say oui oui?

Not at all — it is normal French for an emphatic or reassuring “yes, yes”. The comic association exists only for English speakers.

## Related guides

- French question words: https://cocoonfrench.com/guides/french-question-words
- 50 common French phrases: https://cocoonfrench.com/guides/common-french-phrases
- French pronunciation for beginners: https://cocoonfrench.com/guides/french-pronunciation-for-beginners
- All free French guides: https://cocoonfrench.com/guides