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 business
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "main business" is correct and usable in written English.
You can use it to refer to the primary purpose or activity of a company, organization, or individual. For example, "the main business of the company is developing customized software solutions for businesses."
✓ Grammatically correct
News & Media
Formal & Business
Encyclopedias
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
Main Street, Patchogue WHERE -- Along the villages main business strip.
News & Media
Alibaba's main business is selling.
News & Media
Now his main business is Ms. Twain.
News & Media
Its main business is logistics.
News & Media
Freescale has three main business units.
News & Media
His main business partner was killed.
News & Media
Its main business is offensive hacking.
News & Media
It would also invert the company's main business model.
News & Media
The main business of the ballade had started.
News & Media
The manatees' main business is browsing, cowlike, in underwater pastures.
News & Media
Mountains are now the main business of Chamonix.
News & Media
Expert writing Tips
Best practice
When describing a company's "main business", be specific about the products or services offered to provide clarity and avoid ambiguity. For example, instead of saying 'Our main business is providing solutions', specify 'Our main business is providing cloud-based storage solutions for small businesses'.
Common error
Avoid using overly broad descriptions when defining the "main business". Instead of stating 'Their main business is technology', specify the niche, such as 'Their main business is developing AI-powered cybersecurity software'.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "main business" functions as a noun phrase, typically serving as a subject complement or object in a sentence. Ludwig AI validates its grammatical correctness and usability, confirming that it accurately refers to the primary activity or purpose of an entity.
Frequent in
News & Media
45%
Formal & Business
30%
Encyclopedias
10%
Less common in
Science
5%
Reference
5%
Wiki
5%
Ludwig's WRAP-UP
In summary, "main business" is a common and grammatically sound phrase used to denote the primary activity or focus of an entity. Ludwig AI confirms its accuracy and usability across various contexts. It is most frequently found in News & Media and Formal & Business settings, with a neutral register suitable for professional communication. When using "main business", be specific to avoid ambiguity and consider semantically related alternatives like "core business" or "principal activity" to add variety to your writing. Overall, "main business" is a reliable and versatile phrase for clearly conveying the central operations of a company or organization.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
core business
Replaces "main" with "core", emphasizing the central and essential nature of the business.
principal activity
Uses more formal language to refer to the chief undertaking or operation.
primary focus
Shifts the emphasis from business activity to the area of greatest concentration.
chief operation
Emphasizes the operational aspect of the business, highlighting its key function.
major undertaking
Presents the business as a significant project or enterprise.
leading sector
Identifies the most prominent area of industry or commerce for a particular entity.
primary revenue stream
Focuses on the main source of income for the business.
central function
Highlights the most important role or task performed by the entity.
dominant industry
Refers to the most powerful or influential sector in which the business operates.
key market
Highlights the main segment of the population or area that the business targets
FAQs
How can I use the phrase "main business" in a sentence?
You can use "main business" to describe the primary activity or focus of a company, organization, or individual. For example: 'The company's "core business" is manufacturing automobile parts'.
What are some alternatives to saying "main business"?
Depending on the context, you can use alternatives such as "principal activity", "primary focus", or "chief operation".
Is it correct to use "main business" in formal writing?
Yes, "main business" is appropriate for formal writing, especially in business or academic contexts. It clearly conveys the primary activity of an entity.
What is the difference between "main business" and "side business"?
"Main business" refers to the primary source of revenue or activity, while "side business" indicates a secondary or supplemental venture. For example, someone's main business might be engineering, while their side business is freelance photography.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested