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
core business
Grammar usage guide and real-world examplesUSAGE SUMMARY
"core business" is a perfectly acceptable term in written English and can be used in a variety of contexts.
For example, "The core business of this company is manufacturing automotive parts."
✓ Grammatically correct
News & Media
Formal & Business
Science
Wiki
Alternative expressions(20)
primary activity
main line of work
principal operation
fundamental function
central operation
essential function
main business
focus area
core order
principal business
actual business
concrete business
the business at hand
has business
focus of business
business emphasis
business objective
commercial focus
the core offering
flagship product
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
"That's our core business".
News & Media
"It's to protect our core business".
News & Media
"The core business is slowing significantly".
News & Media
"That just isn't our core business".
News & Media
Companies could concentrate on their core business.
News & Media
"The core business is an afterthought".
News & Media
YOUR core business is running hotels.
News & Media
They have a highly distinctive core business.
News & Media
It's just not our core business anymore".
News & Media
"It is not our core business.
News & Media
Mittal made it his company's core business".
News & Media
Expert writing Tips
Best practice
When discussing strategic pivots, clearly define how the new direction complements or replaces the "core business" to maintain stakeholder confidence.
Common error
Don't narrowly define "core business". A service that indirectly supports your main product can still be vital to overall success. Ensure all contributing elements are valued.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "core business" functions primarily as a noun phrase, often serving as the subject or object of a sentence. It identifies the central or most important activity of an organization, as evidenced by Ludwig's examples.
Frequent in
News & Media
45%
Formal & Business
30%
Science
15%
Less common in
Wiki
5%
Academia
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "core business" is a commonly used noun phrase that defines the central activity of an organization. As confirmed by Ludwig AI, it's grammatically correct and frequently appears in News & Media, Formal & Business, and Science contexts. When using the phrase, consider its professional register and ensure it accurately reflects the primary function of the entity in question. Alternatives include "primary activity" or "main line of work". Remember to clearly define how shifts in strategy affect the "core business" to maintain stakeholder understanding.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
primary activity
Focuses on the main actions carried out by a company.
main line of work
Highlights the principal occupation or employment of an entity.
principal operation
Emphasizes the chief operational activities.
fundamental function
Underlines the basic and necessary duties of a business.
central operation
Indicates operations at the heart of the business.
chief business
Highlights that the alternative business is of primary importance.
essential function
Highlights that the alternative function is indispensable.
key activity
Highlights that the alternative activity is of primary importance.
main business
Stresses the primary aspect of an enterprise.
focus area
Describes an area where effort and resources are concentrated.
FAQs
How to use "core business" in a sentence?
You can use "core business" to describe the primary activity of a company. For example, "Our "core business" is providing software solutions to small businesses."
What can I say instead of "core business"?
You can use alternatives like "primary activity", "main line of work", or "principal operation depending on the context."
Which is correct, "core business" or "core businesses"?
"Core business" is typically used in the singular to refer to the primary activity of a company as a whole. "Core businesses" can be used if referring to multiple distinct primary activities or business units.
What's the difference between "core business" and "side project"?
"Core business" refers to the primary revenue-generating activity, while "side project" is a secondary or experimental activity that may or may not contribute to the main business.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested