Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
he is definitely
Grammar usage guide and real-world examplesUSAGE SUMMARY
'he is definitely' is a correct and usable part of a sentence.
You can use it to emphasize the certainty of a statement. For example: He is definitely the best candidate for the job.
✓ Grammatically correct
News & Media
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
"He is definitely out.
News & Media
He is definitely a keeper.
News & Media
He is definitely a grump.
News & Media
He is definitely one".
News & Media
He is definitely a champion".
News & Media
And he is definitely funny.
News & Media
But he is definitely not normal.
News & Media
But he is definitely leaning toward Miami.
News & Media
He is definitely a mature boy.
News & Media
He is definitely not his dad.
News & Media
He is definitely out for 21 days".
News & Media
Expert writing Tips
Best practice
Use "he is definitely" to clearly and confidently express a conviction, leaving little room for ambiguity. It works well when you want to assert a point strongly.
Common error
Avoid using "he is definitely" excessively in your writing, as it can make your tone sound repetitive or overly assertive. Vary your language by using synonyms or rephrasing your sentences to maintain a natural flow.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "he is definitely" functions as an emphatic assertion, strengthening the verb 'is' to convey a strong sense of certainty or conviction. Ludwig's examples show it is used to express clear opinions and decisive statements.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "he is definitely" is a grammatically sound and frequently used phrase employed to express a strong sense of certainty. As Ludwig's AI confirms, it serves to emphasize the verb 'is', adding weight to the statement. Predominantly found in News & Media, it bridges both formal and informal registers. While a potent tool for assertion, mindful usage ensures it doesn't overwhelm one's writing. Alternatives like "he is certainly" or "he is undoubtedly" offer tonal variety while retaining the core message of assuredness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
he is certainly
Replaces "definitely" with "certainly" offering a slightly more formal tone but maintains the strong sense of assurance.
he is absolutely
Replaces "definitely" with "absolutely", amplifying the sense of certainty.
he is without a doubt
Emphasizes the lack of uncertainty, making the statement stronger.
he is undoubtedly
Similar to "without a doubt", highlighting the absence of doubt.
he surely is
Inverts the structure for emphasis, maintaining a high degree of certainty.
he most certainly is
Adds "most" to intensify the certainty expressed.
it is definite that he is
Restructures the sentence to emphasize the definiteness of the situation.
there's no question that he is
States explicitly that there is no doubt or uncertainty about the matter.
he is positively
Uses "positively" to express a firm and confident affirmation.
he is unequivocally
Conveys certainty in a clear and unambiguous manner, suitable for formal contexts.
FAQs
How can I use "he is definitely" in a sentence?
"He is definitely" is used to express a strong degree of certainty about something. For example, you might say, "He is definitely the best candidate for the job", to assert your strong belief in his qualifications.
What are some alternatives to "he is definitely"?
You can use alternatives like "he is certainly", "he is undoubtedly", or "he is absolutely" to express a similar level of confidence.
Is it grammatically correct to use "he is definitely"?
Yes, it is grammatically correct. "Definitely" is an adverb that modifies the verb "is", indicating a strong affirmation.
What's the difference between "he is definitely" and "he is probably"?
"He is definitely" expresses a strong conviction and certainty, while "he is probably" indicates a higher degree of uncertainty and likelihood, but not a guarantee. The first conveys assurance, while the second suggests a possibility.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested