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
significant of which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "significant of which" is not correct in standard written English.
It seems to be a misconstruction; the correct phrase would typically be "of which" or "significant in which." Example: "The study revealed several factors, significant in which were the environmental impacts."
⚠ May contain grammatical issues
News & Media
Science
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
59 human-written examples
But as a fuel hydrogen has drawbacks, the most significant of which is that its physical density is extremely low.
News & Media
This sequence of events informs the structure of the film as well as the tricks, the most significant of which is known as 'the Transported Man'.
News & Media
It is often said that golf is a game of inches, the most significant of which lie between a player's ears.
News & Media
But Rosen's words warrant attention for several reasons, the most significant of which I'll save for last.
News & Media
This book features a host of problems, the most significant of which have come to be called Diophantine equations.
Encyclopedias
What a well-financed defense can do is exploit error, the two most significant of which, calling Mark Fuhrman as a witness and making Simpson try on the famous gloves, were made by Darden himself.
News & Media
The Knicks, largely on the recommendation of Coach JEFF VAN GUNDY, were one of the six teams to vote against the league's new rule changes, the most significant of which was allowing zone defenses.
News & Media
He won just five events in the next 12 years – the consequence of any number of factors, the most significant of which, at least in strictly professional terms, were dreadful putting woes.
News & Media
"A lot of things happened in the last few months, the most significant of which was the passing of Harold, who was a very good friend who was extraordinarily influential in my career," Reitman told Deadline.
News & Media
The Swans made three changes after their elimination from Europe in Naples on Thursday, the most significant of which saw Leon Britton restored in midfield, where his energy and immaculate distribution made him the man of the match.
News & Media
The deteriorating GCSE figures follow a series of controversial changes to exam rules and league tables, the most significant of which is that only a pupil's first attempt at sitting a GCSE paper now counts towards a school's pass rate.
News & Media
Expert writing Tips
Best practice
While widely used, consider replacing "significant of which" with grammatically sound alternatives like "the most significant of which" or rephrasing for clarity and correctness.
Common error
Avoid using "significant of which" when you intend to say "the most significant of which". The latter is grammatically correct and widely accepted. It clearly indicates the most important item from a group.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "significant of which" functions as part of a relative clause, attempting to identify the most important item within a previously mentioned group. However, it is considered grammatically incorrect. This is supported by Ludwig AI, which suggests it's a misconstruction.
Frequent in
News & Media
39%
Science
34%
Encyclopedias
8%
Less common in
Wiki
10%
Formal & Business
5%
Reference
4%
Ludwig's WRAP-UP
In summary, the phrase "significant of which" is commonly used but is considered grammatically incorrect. Ludwig AI confirms this assessment. Although frequently found in news, science, and encyclopedic contexts, writers should opt for grammatically correct alternatives like "the most significant of which" or rephrase the sentence for improved clarity and correctness. Despite its prevalence, relying on this phrase can undermine the professional tone in formal writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the most significant among which
This alternative more explicitly highlights the comparison being made within the group.
the most important of which
Replaces "significant" with "important", offering a common synonym with largely the same meaning.
the most notable of these
Uses "notable" instead of "significant", suggesting something worthy of attention.
the primary one of these being
Changes the structure to emphasize a single, primary element from the group.
chief among these
A more concise way to indicate the most important item in a list.
the outstanding example of which
Emphasizes a particularly excellent or prominent instance.
the key aspect of which
Focuses on an essential element or feature within the larger context.
most notably
Highlights something worth noting or remembering.
especially
Offers a simpler, more direct way to highlight a particular item or aspect.
particularly
Similar to "especially", providing a focused emphasis.
FAQs
How can I correctly use "significant of which" in a sentence?
The phrase "significant of which" is generally considered grammatically incorrect. Use "the most significant of which" instead for correct usage.
What is a better alternative to "significant of which"?
Consider using phrases like "the most important of which", "the most notable of which", or rephrasing the sentence for better clarity.
Is "significant of which" grammatically correct?
No, "significant of which" is not considered grammatically correct. The correct form is generally "the most significant of which".
What's the difference between "significant of which" and "the most significant of which"?
"Significant of which" is grammatically questionable, while "the most significant of which" is a grammatically correct way to indicate the most important element among several.
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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested