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
valid of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "valid of" is not correct and not usable in written English.
It seems to be an incorrect construction, as "valid" typically requires a different preposition, such as "valid for" or "valid in." Example: "The coupon is valid for one month from the date of purchase."
⚠ May contain grammatical issues
Alternative expressions(7)
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
19 human-written examples
The most valid of Romney's assumptions is that his problems with the conservative base limit his freedom of movement.
News & Media
Those numbers were valid, of course, before the war to depose President Bashar al-Assad ensnared a city known — wrongly, many contend — as a pillar of the regime.
News & Media
Mr. Benjamin's concern for human safety is completely valid, of course, but that simply means that the symbols must be guarded with the most vigilant security, and perhaps new security measures must be developed.
News & Media
Torrance provided additional support for his approach in follow-up studies of his subjects after 7, 12, and 22 years, and the passage of time has shown the TTCT to be among the more valid of all creativity tests.
Encyclopedias
His two-part solo, called "Not/Without Words" and set to music by Evelyn Glennie, the acclaimed percussionist, who is hearing impaired, addresses head-on what would normally be an infirmity in dance and makes something new and valid of it.
News & Media
The "merchant adoption" hurdle is valid, of course, but contactless infrastructure is already in more locations than consumers may realize, even if it's somewhat underused.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
39 human-written examples
Percent of valid answers of respondents, aPercent of 245 users.
Science
The accuracy of Eq. R.1 hinges on use of valid estimates of slopes and intercepts.
Science
Let V¹ be the set of valid sentences of first-order logic and let V² be the set of valid sentences of second-order logic.
Science
It most likely led to a muting of valid criticisms of his tenure.
News & Media
There are still plenty of valid points of criticism to be made.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "valid of". Instead, use more grammatically correct alternatives such as "valid for" or "valid in", depending on the context. For example, use "valid for the next year" instead of "valid of the next year".
Common error
A common mistake is using the preposition "of" after "valid". Remember that "valid" typically requires prepositions like "for" or "in" to correctly specify the context or duration of validity. Using "of" can lead to grammatical errors and unclear meanings.
Source & Trust
60%
Authority and reliability
1.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "valid of" functions incorrectly as it attempts to link the adjective "valid" with a preposition that does not typically follow it. As noted by Ludwig AI, standard usage requires prepositions like "for" or "in" to establish a relationship or scope.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "valid of" is grammatically incorrect and should be avoided. Ludwig AI underscores that standard English requires alternative constructions, primarily using "valid for" to denote duration or purpose, and "valid in" to indicate context or scope. Due to its incorrectness, using "valid of" can lead to confusion and negatively impact the credibility of your writing. Always opt for grammatically sound alternatives to ensure clarity and accuracy in communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
valid for
Specifies the duration or context in which something is valid.
valid in
Indicates the scope or domain where something is valid.
applicable to
Highlights the relevance or suitability of something.
relevant to
Focuses on the pertinence or connection of something.
appropriate for
Emphasizes the suitability or fitness of something.
true of
Indicates that something accurately describes a particular subject.
correct for
Highlights an adjustment made to account for something.
accurate regarding
Emphasizes the correctness and precision of information.
fitting for
Emphasizes the appropriateness of something.
suitable for
Focuses on the appropriateness or adequacy of something.
FAQs
What prepositions should I use with the word "valid"?
The word "valid" commonly combines with prepositions such as "for", as in "This ticket is valid for three months", or "in", as in "This argument is valid in the context of this discussion".
What can I say instead of "valid of"?
Is it correct to say "valid of the agreement"?
No, it is not correct. A more appropriate phrase would be "valid under the agreement" or "valid according to the agreement".
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
60%
Authority and reliability
1.5/5
Expert rating
Real-world application tested