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
not existing
Grammar usage guide and real-world examplesUSAGE SUMMARY
"not existing" is a grammatically correct and commonly used phrase in written English.
It is often used to describe something that does not currently exist. Example: "The unicorn is a mythical creature, not existing in reality."
✓ Grammatically correct
News & Media
Science
Academia
Encyclopedias
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
If a being is capable of not existing, then there is a time at which it does not exist.
Encyclopedias
If indeed the state of not existing is no worse than that of experiencing the benefits of existence, then, since existing invariably brings harm in its wake, existing is always a net harm compared to not existing.
Science
It was not existing at all".
News & Media
I said, "I'm afraid of not existing".
News & Media
"There is a fear of not existing.
News & Media
And if they don't, they risk not existing.
News & Media
But then fame came, and it was not existing".
News & Media
Not being online today is akin to not existing.
News & Media
when the error is due to the file not existing.
Academia
Moreover, the EU has barred future, not existing, defence deals.
News & Media
In general, agents say they worry most about new business, not existing deals.
News & Media
Expert writing Tips
Best practice
Pair the phrase with contrasting terms like "already existing" or "newly existing" to create clear distinctions in business and policy writing.
Common error
While both are occasionally seen, "not existing" is significantly more common in high-quality prose. Avoid using "non-existing" as a hyphenated adjective unless you are certain it is the standard term in your specific technical field.
Source & Trust
93%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "not existing" primarily functions as a negative present participle phrase. In the examples provided by Ludwig, it often serves as a predicative complement or an adjunct describing the state of a subject. Ludwig AI confirms its grammatical validity and its frequent role in defining the boundary between being and non-being.
Frequent in
News & Media
45%
Academia
25%
Science
15%
Less common in
Encyclopedias
8%
Wiki
4%
Social Media
3%
Ludwig's WRAP-UP
In summary, "not existing" is a robust and grammatically sound phrase used extensively across high-level journalism, science and philosophy. Ludwig AI highlights that it is the preferred way to describe the state of something that lacks existence, especially when used in comparisons or as part of a gerund phrase. While "non-existent" is a common adjectival alternative, "not existing" offers more flexibility in complex sentence structures. It is particularly valuable in academic writing when discussing potentiality, void or the absence of evidence.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
non-existent
Changes the participle into a standard adjective and is often more concise
not extant
Adds a more formal or academic tone, specifically referring to surviving documents or species
nonexistence
Uses the noun form to describe the state itself rather than a condition
not being
A more ontological or philosophical variation focusing on the state of being
absent
Focuses on the lack of presence in a specific location or context
not present
Slightly more literal and often used in observational or scientific reporting
not occurring
Specific to events, processes or phenomena rather than physical objects
missing
Implies that the thing should be there but is not
lacking
Emphasizes the deficiency or the absence of a specific quality
void
Suggests a complete emptiness or legal invalidity
FAQs
How do I use "not existing" in a sentence?
You can use it to describe a state of being, such as: "There is a deep-seated human fear of "not existing" after death."
What is the difference between "not existing" and "non-existent"?
While "non-existent" is a standard adjective, "not existing" functions as a participle phrase often used to describe the act or state of being absent. For example, "the problem of the file "not existing"" is more natural in technical contexts than "non-existent file problem".
Is "not existing" formal enough for academic writing?
Yes, it is widely used in academic and philosophical contexts. For a more formal alternative regarding objects or documents, you might consider "not extant".
Can I use "absent" instead of "not existing"?
Yes, if you are referring to something that is missing from a specific place. You could say "absent" or "not present" depending on the scientific or casual tone you wish to strike.
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
93%
Authority and reliability
4.8/5
Expert rating
Real-world application tested