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
main
Grammar usage guide and real-world examplesUSAGE SUMMARY
"main" is correct and usable in written English.
You can use it as an adjective or noun to refer to the most important or focus of an activity. For example: "This is the main reason why we decided to move." or "The main issue that needs to be addressed is cost."
✓ Grammatically correct
News & Media
Formal & Business
Science
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
Among the last set of polls, three showed the main parties level-pegging, three had the Conservatives in front by a single point and one gave Labour a two-point advantage.
News & Media
For two main reasons.
News & Media
In reality, the effect on MPs' seats is more complex to measure as voters are not spread evenly across constituencies: some areas within may heavily favour one party, others its main rival.
News & Media
This month, the Portuguese government agreed with the main opposition party on more austerity measures to cut its deficit faster than planned, to 4.6 percent of Portugal's gross domestic product next year from 9.4 percent last year.
News & Media
"That's our main concern".
News & Media
There are three main reasons for that.
News & Media
The main opposition party could hardly refuse to support it, or it would be displaying lack of confidence in its ability to win the ensuing general election.
News & Media
Inside the cocoon of an event where the main sponsors don't accept that human caused climate change is even real, the news from Beijing seemed to further outline how rapidly the world could change – whether the coal industry likes it or not.
News & Media
Take two relatively recent scandals of agents the forces of law and order were running within two main paramilitary force as evidence of this.
News & Media
He was the main presenter of BBC Breakfast for a number of years.
News & Media
Yet while Santiago offers an intriguing and easy introduction to the country, it is nothing more than an appetizer for the main courses to be found elsewhere.
News & Media
Expert writing Tips
Best practice
Use "main" to clearly identify the most important element, aspect, or component of something, ensuring clarity in your communication.
Common error
Avoid using "main" repeatedly within the same paragraph. Opt for synonyms like "primary", "key", or "central" to vary your language and maintain reader engagement.
Source & Trust
94%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
The word "main" primarily functions as an adjective to describe something of chief importance or size. As Ludwig AI confirms, it is grammatically correct and widely used. It can also function as a noun, referring to the principal part of something.
Frequent in
News & Media
45%
Formal & Business
25%
Science
15%
Less common in
Encyclopedias
5%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
In summary, "main" is a versatile word, functioning primarily as an adjective or noun to denote chief importance or centrality. Ludwig AI validates its grammatical correctness and widespread use. While its meaning is straightforward, substituting it with synonyms like "primary" or "principal" can enhance writing. Used across diverse contexts, predominantly in News & Media, Formal & Business, and Science, "main" serves as a reliable tool for emphasizing significance. To maintain writing quality, consider diversifying word choice to avoid redundancy.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
primary
Focuses on the order of importance or sequence rather than sheer dominance.
chief
Emphasizes a position of leadership or command.
principal
Highlights the foremost or leading element in a set.
key
Stresses the essential or crucial nature of something.
central
Indicates a position of centrality or focus.
major
Suggests a significant degree or extent.
foremost
Highlights preeminence or the highest rank.
leading
Suggests guidance or direction.
paramount
Emphasizes supreme importance or authority.
dominant
Stresses control or influence over others.
FAQs
How can I use "main" in a sentence?
You can use "main" as an adjective, such as in "The "main reason" for the decision was cost", or as a noun, like in "The "main course" was delicious".
What are some alternatives to the word "main"?
Is it correct to say "the main important thing"?
While understandable, "the main important thing" can be redundant. It's often better to use either "the "main thing"" or "the most important thing".
What's the difference between "main" and "primary"?
"Main" generally indicates the most significant or prominent aspect, while "primary" suggests the first in order or importance. The best word depends on whether you want to emphasize significance or sequence.
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
94%
Authority and reliability
4.8/5
Expert rating
Real-world application tested