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
A boundary
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "A boundary" is correct and usable in written English.
You can use it when referring to a limit or dividing line between two areas, concepts, or ideas. Example: "Establishing a boundary between work and personal life is essential for maintaining a healthy balance."
✓ Grammatically correct
Science
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
59 human-written examples
A boundary is that which is an extremity of anything".
Science
A boundary condition is defined as a boundary interaction type and an associated probability.
Science
A Boundary Element Method is used for the forward model.
Science
Religion is a Boundary Condition".
News & Media
It's broken a boundary".
News & Media
"It's a boundary.
News & Media
It's a boundary marker.
News & Media
"Because I'm breaking a boundary there.
News & Media
Was Mr. Winter crossing a boundary?
News & Media
Every agoraphobic has a boundary.
News & Media
The outlier marks a boundary.
News & Media
Expert writing Tips
Best practice
When using "a boundary", consider the specific context to ensure it accurately conveys the intended meaning. Be mindful of whether you're referring to a physical, conceptual, or metaphorical limit.
Common error
Avoid using "a boundary" in situations where a more specific term like "limit", "edge", or "border" would provide greater clarity. Using a precise term enhances communication and avoids ambiguity.
Source & Trust
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a boundary" primarily functions as a noun phrase, often acting as a subject, object, or complement within a sentence. As evidenced by Ludwig, it commonly denotes a limit or dividing line, whether physical, conceptual, or metaphorical.
Frequent in
News & Media
43%
Science
36%
Wiki
9%
Less common in
Formal & Business
5%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, "a boundary" is a noun phrase denoting a limit or dividing line, used across various contexts from science to news media. Ludwig AI confirms its grammatical correctness and frequent usage. While generally neutral in register, it can be formal in specific fields. When employing the phrase, consider whether more specific terms might enhance clarity. As an alternative to "a boundary", consider options such as "a limit", "a border", or "a demarcation" for nuanced communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
A limit
General term for a restriction on extent, amount, or scope.
A border
Often refers to the edge of a country or region.
A borderline
Suggests an area or situation that is on the edge between two states or conditions.
A perimeter
Indicates the outer limits of an enclosed space or area.
A threshold
Implies a point of entry or the start of a new phase or condition.
A frontier
Refers more to an edge or limit of a developed area, suggesting exploration or newness.
A line
A simple, often literal demarcation between two areas.
A delineation
More formal than “a line”, suggests a clear and distinct marking.
A delimitation
Formal term indicating a precise marking or definition of a boundary.
A transit
Indicates crossing a boundary or passing through an area.
FAQs
How can I use "a boundary" in a sentence?
You can use "a boundary" to refer to a limit or dividing line. For example, "The river serves as "a boundary" between the two countries" or "It's important to set "a boundary" between work and personal life."
What can I say instead of "a boundary"?
You can use alternatives like "a limit", "a border", or "a demarcation" depending on the context.
When is it appropriate to use "a boundary" instead of "a border"?
"A border" typically refers to a geographical or political line separating regions or countries. "A boundary" is a more general term that can refer to any kind of limit or dividing line, physical or conceptual. For instance, you might speak of ""a boundary" of acceptable behavior". You probably won't say a border of acceptable behavior.
Is "a boundary line" redundant?
While "a boundary line" is not strictly redundant, "a boundary" often implies a line of demarcation. Using just ""a boundary"" is usually sufficient unless you specifically need to emphasize that the boundary is a line.
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
4.6/5
Expert rating
Real-world application tested