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
theoretical
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "theoretical" is correct and usable in written English.
It can be used when discussing concepts, ideas, or principles that are based on theory rather than practical application or empirical evidence. Example: "In a theoretical framework, we can explore the implications of quantum mechanics on our understanding of reality."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(6)
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
For cities shadows present both a technical challenge – one that can be modelled in 3D and measured in "theoretical annual sunlight hours" lost – and an ethereal one, changing the feeling of space and the value of property in ways that are hard to define.
News & Media
Its internal divisions could explode; and the demographics are against it: most supporters in the east are pensioners (people like the 18-year old Linke deputy in the Saxony parliament are mere window-dressing), while in the west the party is dominated by older communists and sectarian splinter groups, whose theoretical positions the easterners often find baffling.
News & Media
The defence seized on this, positing that this theoretical aneurysm could have ruptured when Kwementyaye fell, rather than when he was beaten about the head.
News & Media
This theoretical idea is surely worth valuing more than, say, actual parenthood, for which IVF has been such a boon, allowing millions of men and women to become the parents they long to be.
News & Media
As Hawking says, you may care to pay close attention to the study of theoretical physics and accept that, somewhere, Strauss is on the fast track to being an inevitably inadequate minister of something or other by 2020, while Michael Vaughan's first act as director of cricket has been to recall Pietersen.
News & Media
If you can, try following the lead of Peter Higgs, the JD Salinger of theoretical physics, who ran off on holiday without a phone before he could even be told that he'd won the prize in physics this week.
News & Media
Although attendees will tackle some practical exercises, this is largely a theoretical tutorial.
News & Media
The great theoretical physicist breakfasted on these slightly sweetened fried eggs.
News & Media
Now they must hire shadow consultants to calculate how much theoretical sunlight, in square-foot-hours, a park would receive over a year if nothing were blocking it.
News & Media
The other day, however, I was focusing on the theoretical ways to cheat the reaper.
News & Media
"I am quite impressed with the level of theoretical knowledge required and the technical skills.
News & Media
Expert writing Tips
Best practice
When using "theoretical", ensure that the context clearly distinguishes between abstract concepts and practical applications. Emphasize the speculative or hypothetical nature of the idea being presented.
Common error
Avoid using "theoretical" to describe something that has been empirically proven or widely accepted as fact. This can undermine the credibility of your writing.
Source & Trust
94%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The word "theoretical" primarily functions as an adjective, modifying nouns to indicate that something is based on theory rather than practical experience or concrete evidence. Examples from Ludwig illustrate its use in contexts such as "theoretical physics" and "theoretical knowledge". According to Ludwig AI, the word is correct and usable in English.
Frequent in
News & Media
40%
Science
30%
Formal & Business
15%
Less common in
Encyclopedias
5%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
The adjective "theoretical" is frequently used to describe concepts, ideas, or approaches based on theory rather than direct experience or empirical evidence. As indicated by Ludwig AI, the phrase is correct and usable in English. It commonly appears in contexts such as "News & Media", "Science", and "Formal & Business". Its authoritative usage is supported by sources like The Guardian and The Economist. When using "theoretical", it is important to ensure the context clearly indicates the hypothetical or speculative nature of the concept being discussed. Avoiding misapplication by using it in contexts where something is already empirically proven, will keep your writing credible.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
hypothetical
Emphasizes a conditional or assumed basis, often lacking empirical support.
conceptual
Focuses on ideas and concepts, often in contrast to practical application.
speculative
Highlights the conjectural nature, implying a degree of uncertainty.
abstract
Indicates a departure from concrete reality towards generalized ideas.
notional
Implies something existing only in theory or as an idea.
academic
Relates to scholarly or educational contexts, often involving abstract reasoning.
philosophical
Connects to fundamental questions about existence, knowledge, and values.
doctrinal
Pertains to established principles or beliefs, often within a specific field.
pure
Focuses on the unapplied, fundamental aspects of a subject.
unproven
Highlights the lack of empirical verification or confirmation.
FAQs
How to use "theoretical" in a sentence?
You can use "theoretical" to describe concepts or ideas that are based on theory rather than practical evidence. For example, "The discussion remained "theoretical" because it lacked real-world examples."
What can I say instead of "theoretical"?
You can use alternatives like "hypothetical", "conceptual", or "speculative" depending on the context.
Which is correct, "theoretical" or "theoretic"?
"Theoretical" is the more commonly used adjective form of "theory". "Theoretic" is a less frequent variant with essentially the same meaning, but "theoretical" is generally preferred.
What's the difference between "theoretical" and "practical"?
"Theoretical" refers to ideas and concepts, while "practical" refers to real-world applications and implementations. "Theoretical knowledge" is the understanding of principles, while "practical experience" is the hands-on application of those principles.
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
4.5/5
Expert rating
Real-world application tested