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
alien concept
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "alien concept" is correct and usable in written English.
You can use it to describe something that is completely unfamiliar or strange. For example, "Understanding quantum physics is an alien concept for most people."
✓ Grammatically correct
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
Ordering in was an alien concept.
News & Media
Retirement was an alien concept to Knowles.
News & Media
But it's not an alien concept".
News & Media
This is not an alien concept to him.
News & Media
It's an alien concept for the more naturalistic RSC actors.
News & Media
Off-stage is an alien concept in a Propeller production.
News & Media
That was an alien concept 15 years ago.
News & Media
"Teaching to the test" is an alien concept.
News & Media
Hitting, in fact, has been an alien concept to them.
News & Media
TURNING down an inheritance may seem to be an alien concept.
News & Media
That would have been an alien concept to Hearst, Mr. Nasaw said.
News & Media
Expert writing Tips
Best practice
Use "alien concept" to describe ideas, practices, or technologies that are completely new, unfamiliar, or seem out of place in a particular context. For emphasis, you can modify with an adverb like "completely alien concept".
Common error
Avoid using "alien concept" to describe something simply disliked or disagreed with. Ensure it truly represents something outside of one's experience or understanding, rather than just a preference.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "alien concept" functions primarily as a noun phrase, acting as a subject complement or object in a sentence. It describes something that is unfamiliar, foreign, or strange. Ludwig provides numerous examples where this phrase is used to depict ideas or practices that are outside of one's understanding or experience.
Frequent in
News & Media
90%
Formal & Business
5%
Science
3%
Less common in
Encyclopedias
1%
Wiki
0.5%
Reference
0.5%
Ludwig's WRAP-UP
The phrase "alien concept" is a commonly used and grammatically correct noun phrase that effectively conveys the idea of something being unfamiliar or strange. As Ludwig AI confirms, it's suitable for various contexts, particularly in news and media, where it serves to highlight novel or poorly understood ideas. Alternatives such as "foreign idea" or "unfamiliar notion" offer similar meanings, allowing for nuanced expression. When using this phrase, ensure it accurately represents something genuinely outside of one's experience rather than a mere disagreement. With its widespread recognition and clear meaning, "alien concept" remains a valuable tool for expressing unfamiliarity in both formal and informal settings.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
foreign idea
Replaces "concept" with "idea", slightly altering the nuance to emphasize a lack of familiarity.
unfamiliar notion
Substitutes both "alien" and "concept" to highlight the lack of acquaintance with something.
strange idea
Uses "strange" to convey the unusual or peculiar nature of the concept.
unconventional concept
Emphasizes the departure from accepted norms or standards.
novel idea
Highlights the new or original nature of the concept.
incomprehensible idea
Focuses on the difficulty or impossibility of understanding the concept.
unfathomable notion
Stresses the depth and complexity that makes the concept difficult to grasp.
esoteric concept
Indicates that the concept is only understood by a small group of people.
outlandish concept
Implies that the concept is bizarre or highly unusual.
radical concept
Suggests the concept is a fundamental departure from existing norms and ideas.
FAQs
How can I use "alien concept" in a sentence?
You can use "alien concept" to describe something unfamiliar or strange. For example, "For someone raised in a digital age, the concept of sending a letter via postal mail might seem like an "alien concept"".
What are some alternatives to "alien concept"?
You can use alternatives like "foreign idea", "unfamiliar notion", or "strange idea" depending on the context.
Is it appropriate to use "alien concept" in formal writing?
Yes, "alien concept" is appropriate for both formal and informal writing, as shown by its use in news articles, academic papers, and casual discussions. It maintains a neutral tone and is widely understood.
What does it mean when something is described as an "alien concept"?
Describing something as an ""alien concept"" means it is unfamiliar, strange, or outside of one's understanding or experience. It suggests a significant disconnect from the norm.
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
4.5/5
Expert rating
Real-world application tested