Definitely vs Hells yes

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

Definitely

Top 1,000 (very common)A2adverb

Hells yes

SlangBeyond 10,000 (less common)
Most formal: DefinitelyMost common: Definitely
 DefinitelyHells yes
Pronunciation🇬🇧 /["/ˈdefɪnətli/"]/🇺🇸 /["/ˈdefɪnətli/"]/🇬🇧 //hɛlz jɛs//🇺🇸 //hɛlz jɛs//
MeaningFor sure, without a doubtAn enthusiastic way to say yes.
ExampleI definitely remember sending the letter.When she asked if I wanted to join the concert, I shouted, 'Hells yes!'
RegisterNeutralSlang
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelA2-
Part of speechadverb
Collocationsdefinitely agree, definitely believe, definitely knowHells yes!, say hells yes, respond with hells yes
Antonymsdoubtfully, uncertainly-
Common mistakesOften confused with 'defiantly' which means resisting authority., Sometimes spelled incorrectly as 'definately'.Using in formal situations where 'yes' is more appropriate., Mispronouncing or spelling it incorrectly as 'Hell yes'., Using it when a calmer response is needed.
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.'Hells yes' is informal and often used among friends or in casual settings when expressing strong agreement or excitement.

See it in real clips

Definitely
Hells yes

Frequently asked questions: Definitely vs Hells yes

What's the difference between Definitely and Hells yes?

Definitely: For sure, without a doubt Hells yes: An enthusiastic way to say yes.

Which is more formal: Definitely and Hells yes?

Definitely is the most formal of these.

Which is more common: Definitely and Hells yes?

Definitely is the most common in everyday English.

Can you show an example of each?

Definitely: I definitely remember sending the letter. Hells yes: When she asked if I wanted to join the concert, I shouted, 'Hells yes!'

Can I use Definitely and Hells yes interchangeably?

Not always. Definitely and Hells 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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