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
that defines
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that defines" is correct and usable in written English.
You can use it when you want to specify or clarify the meaning or characteristics of something. Example: "The term 'sustainability' refers to practices that define our approach to environmental conservation."
✓ Grammatically correct
News & Media
Academia
Alternative expressions(20)
which suggests that
which constitutes
that stipulates
which derives that
that denotes
that indicates
that determine
according to
which implies that
which means that
that specifies
that asserts
that provides
which gives that
that embodies
which shows that
as defined by
which follows that
which entails that
that characterizes
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 defines everything.
News & Media
"It's not something that defines me.
News & Media
It's your husband that defines you".
News & Media
It's a moment that defines a career.
News & Media
We're waiting for something that defines her.
News & Media
Argyll is a region that defines tranquillity.
News & Media
There is one value that defines Golden.
News & Media
But it is Plains that defines him.
News & Media
Just what is it that defines populism?
Academia
Parameter that defines a gauss distribution.
Academia
The transience that defines what it means to be human".
News & Media
Expert writing Tips
Best practice
Use "that defines" to clearly and concisely indicate the essential qualities or characteristics of a subject. Ensure the defining characteristic is pivotal to the subject's understanding.
Common error
Avoid using "that defines" when the characteristic is trivial or obvious. Ensure the attribute provides genuine insight, not just a superficial description.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that defines" functions as a relative clause, specifically a defining relative clause. It modifies a noun by specifying or limiting its meaning, indicating an essential attribute or characteristic. According to Ludwig, this phrase is correct and usable in written English.
Frequent in
News & Media
68%
Academia
15%
Formal & Business
6%
Less common in
Science
6%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "that defines" serves to specify the essential attributes of a subject. Grammatically correct and widely applicable across various contexts, from news to academia, it helps clarify understanding by highlighting key characteristics. Ludwig AI confirms its proper usage and provides numerous examples. While versatile, it is best used when the defining characteristic offers genuine insight. Alternatives such as "which characterizes" or "which determines" can provide nuanced variations depending on the context.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
which characterizes
Replaces "that defines" with a focus on typical attributes.
which determines
Substitutes "that defines" by highlighting the act of establishing limits or outcomes.
that specifies
Replaces "that defines" with an emphasis on particular conditions or details.
that identifies
Changes "that defines" to highlight the recognition or establishment of something's identity.
that distinguishes
Replaces "that defines" to focus on features setting something apart from others.
that encapsulates
Substitutes "that defines" by highlighting how something briefly expresses essential features.
that embodies
Replaces "that defines" with a focus on the physical or tangible representation of something.
that typifies
Changes "that defines" to emphasize the quality of being representative of a class or type.
which constitutes
Substitutes "that defines" by indicating the elements or parts that form a whole.
which marks
Changes "that defines" to highlight a characteristic or feature that is distinctive.
FAQs
How can I use "that defines" in a sentence?
Use "that defines" to specify the core characteristics or essence of something. For example, "Integrity is the quality "that defines" a trustworthy leader."
What are some alternatives to "that defines"?
Depending on the context, you can use alternatives like "which characterizes", "that specifies", or "which determines".
Is it better to use "that defines" or "that identifies"?
The choice depends on the nuance you want to convey. "That defines" emphasizes the core essence or characteristics, while "that identifies" focuses on distinguishing or recognizing something.
How does "that defines" differ from "that describes"?
"That defines" indicates essential qualities necessary for understanding something, whereas "that describes" provides a more general account of its attributes without necessarily focusing on what is essential.
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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested