Definitely vs Oh god yes

When to use each in English, with meaning, register, and examples.

Definitely

Top 1,000 (very common)A2adverb

Oh god yes

InformalBeyond 10,000 (less common)
Most formal: DefinitelyMost common: Definitely
 DefinitelyOh god yes
Pronunciation🇬🇧 /["/ˈdefɪnətli/"]/🇺🇸 /["/ˈdefɪnətli/"]/🇬🇧 //əʊ gɒd jɛs//🇺🇸 //oʊ ɡɑd jɛs//
MeaningFor sure, without a doubtAn enthusiastic affirmation or agreement.
ExampleI definitely remember sending the letter.When she suggested a beach trip, I responded, 'Oh god yes!'
RegisterNeutralInformal
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelA2-
Part of speechadverb
Collocationsdefinitely agree, definitely believe, definitely knowOh god yes, please, Oh god yes, absolutely, Oh god yes, I agree, Oh god yes, that sounds great
Antonymsdoubtfully, uncertainly-
Common mistakesOften confused with 'defiantly' which means resisting authority., Sometimes spelled incorrectly as 'definately'.Used in serious contexts, misunderstanding its informal nature., Omitting 'Oh' and saying only 'God yes', which feels less expressive., Misplacing emphasis, making it sound sarcastic instead of genuine.
Usage notesUse 'definitely' to emphasize certainty. It fits well in both spoken and written English. Avoid using it in overly formal contexts where alternatives like 'certainly' might be more suitable.Used in casual conversations to express strong agreement or excitement. Not suitable for formal situations.

See it in real clips

Definitely
Oh god yes

Frequently asked questions: Definitely vs Oh god yes

What's the difference between Definitely and Oh god yes?

Definitely: For sure, without a doubt Oh god yes: An enthusiastic affirmation or agreement.

Which is more formal: Definitely and Oh god yes?

Definitely is the most formal of these.

Which is more common: Definitely and Oh god yes?

Definitely is the most common in everyday English.

Can you show an example of each?

Definitely: I definitely remember sending the letter. Oh god yes: When she suggested a beach trip, I responded, 'Oh god yes!'

Can I use Definitely and Oh god yes interchangeably?

Not always. Definitely and Oh god yes are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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