i definitely know

USAGE SUMMARY

"I definitely know" is correct usage in written English.
You might use it when you are expressing certainty in regards to something, such as in this example sentence: "I definitely know I don't want to go to the beach today."

✓ Grammatically correct

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

I definitely know about that.

Yale University

"I definitely know how fortunate I am".

The New York Times - Sports

I definitely know what he's going through.

The New York Times - Sports

"I definitely know that I want children.

The Guardian - Business

I definitely know when it's not a good place.

The New York Times - Arts

I definitely know more about Q&As than most people!

Harvard Business Review

And I definitely know what a dad joke is.

The Washington Post

I definitely know how to talk to people now".

The New York Times

"Actually, I don't know why I'm being modest; I definitely know every starting player".

The New York Times

So I definitely know that I want to have a career that's international.

Cornell University

Tommy Davis told me, "I definitely know where she is," but he won't disclose where that is.

The New Yorker

Expert writing Tips

Best practice

To enhance clarity and impact, follow "i definitely know" with a specific detail or explanation, leaving no room for misinterpretation.

Common error

While "definitely" adds emphasis, overuse can diminish its impact and make your writing sound repetitive. Vary your language with alternatives like "certainly", "assuredly", or "without a doubt" to maintain a strong and credible tone.

Linguistic Context

The phrase "i definitely know" functions as an assertion of certainty. It's used to emphatically state that the speaker possesses knowledge about something, as supported by Ludwig's examples.

Expression frequency: Very common

Frequent in

News & Media

65%

Academia

15%

Formal & Business

10%

Less common in

Science

5%

Encyclopedias

3%

Wiki

2%

Ludwig's WRAP-UP

In summary, "i definitely know" is a grammatically sound and commonly used phrase to express strong certainty or knowledge about something. Ludwig AI confirms its correctness and its frequent appearance across diverse sources, including news media, academic texts, and business communications. While versatile, remember to avoid overuse and consider alternatives like "i am certain" or "i know for sure" to add variety to your writing. The phrase's emphatic nature makes it suitable for scenarios where you need to eliminate doubt and assert your understanding with conviction.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

i know for sure

Adds emphasis on the lack of doubt in the knowledge.

i know without a doubt

Emphasizes the complete absence of uncertainty.

i have no doubt

Shifts the focus to the absence of doubt, implying strong conviction.

i am positive

Expresses certainty with a more informal tone.

i am certain

Expresses assurance without the emphasis of "definitely".

i am sure of it

Adds a casual affirmation of certainty.

i can confirm

Suggests an ability to verify or attest to something.

i am convinced

Indicates a firm belief based on evidence or reasoning.

i am well aware

Indicates a comprehensive understanding, often of a specific situation.

i have ascertained

Implies a confirmed knowledge after investigation or consideration.

FAQs

How can I use "i definitely know" in a sentence?

You can use "i definitely know" to express strong certainty about something. For example, "I definitely know that the meeting is scheduled for tomorrow."

What phrases can I use instead of "i definitely know"?

Alternatives to "i definitely know" include "i am certain", "i know for sure", or "i have no doubt", depending on the context.

Is it correct to say "i definitely know"?

Yes, "i definitely know" is grammatically correct and commonly used to emphasize one's knowledge or certainty about something.

What is the difference between "i think i know" and "i definitely know"?

"I think I know" implies uncertainty or a tentative understanding, whereas "i definitely know" conveys strong conviction and certainty. They differ in the level of confidence expressed.