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
expiration by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "expiration by" is correct and usable in written English.
It can be used to indicate a deadline or the point in time when something will cease to be valid or effective. Example: "The contract will be considered void upon expiration by the end of the month."
✓ Grammatically correct
Science
News & Media
Alternative expressions(4)
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
25 human-written examples
SAP says it provided notice of the transaction to the European Commission on June 16, 2010, which makes July 22, 2010 the date on which the initial 25 working day review period under the European Union merger regulations expires, unless the review period is terminated prior to such expiration by the Commission.
News & Media
In particular, there is something about expiration by excess that is always blackly glamorous.
News & Media
Where the exclusivity period might matter most would be in the cases of drugs whose patents were nearing expiration by the time the developer succeeded in winning F.D.A. approval.
News & Media
Last week, Vivendi found its opportunity to end the arrangement with Artists Management Group, 16 months before the contract's expiration, by raising hard questions that arose from a recent routine audit of the Ovitz film venture.
News & Media
Most colleges temper the trauma of expiration by offering an alumni address that can be used permanently, with mail forwarded to any address the user wishes (which is helpful for those switching jobs often).
News & Media
It is driven by a predetermined flow of oxygen from a high-pressure source and facilitates expiration by suction.
Human-verified similar examples from authoritative sources
Similar Expressions
34 human-written examples
It faces three more "lock-up" expirations by year end with the biggest in November, when a further 1.32 billion shares could flood the market eclipsing last week's 271 million share window, which seems paltry by comparison.
News & Media
Invasive PAOP was independently measured at end-expiration by an experienced investigator (AAH, BF, MC, NP, JPF) who was blinded to TEE results.
Science
Inclusion criteria were the presence of radial artery and central venous catheters and the absence of overhydration, defined by a CVP >11 or >14 mmHg if positive end-expiratory pressure (PEEP) >10 cm H2O, since the latter may elevate atmospheric pressure-referenced intrathoracic filling pressures, measured at end-expiration, by PEEP.
Science
Positive pressure ventilation involves ventilator-controlled inflation of the lungs followed by passive expiration driven by the elastic recoil forces of the respiratory system.
Science
Additionally, we were able to measure the validity duration of the RRSIGs of the found traversed names by subtracting the expiration field by its inception field.
Science
Expert writing Tips
Best practice
When using the phrase "expiration by", ensure the context clearly indicates what is expiring and what event or time the expiration is linked to. For example, specify if it's a contract, patent, or product.
Common error
Avoid using "expiration by" without clearly defining what is expiring. For example, instead of saying "expiration by the end of the month", specify "the contract's expiration by the end of the month" for clarity.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "expiration by" functions as a prepositional phrase specifying the time or event that marks the end of validity or usability. Ludwig AI confirms that the phrase is correct and usable in written English.
Frequent in
Science
32%
News & Media
59%
Formal & Business
9%
Less common in
Wiki
3%
Ludwig's WRAP-UP
The phrase "expiration by" is a grammatically correct and commonly used prepositional phrase indicating the time or event that marks the end of validity. As Ludwig AI confirms, it is a usable phrase in written English. It's particularly common in science and news contexts, and should be used with a clear reference to what is expiring. When writing, avoid vagueness by specifying exactly what is subject to "expiration by" the indicated date or event. While generally neutral in tone, prefer more precise terms when writing formal or scientific content.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
effective until
Focuses on the period during which something remains active or valid.
expiry at
Replaces "expiration" with "expiry" and "by" with "at", focusing on a specific endpoint in time.
deadline for
Highlights the final point in time by which something needs to be done.
termination due to
Emphasizes the cause of ending, shifting the focus to the reason for the expiration.
invalid after
Emphasizes the point at which something becomes void or unusable.
end date of
Highlights the specific date on which something ceases to be valid.
ceases on
Highlights the termination or cessation on a specific point in time.
finalized by
Shifts the emphasis to the completion or finalization of something before a deadline.
completed within
Focuses on finishing something inside a specific time frame, rather than the time something expires.
limit of
Emphasizes the maximum extent or boundary related to something before it expires.
FAQs
How can I use "expiration by" in a sentence?
You can use "expiration by" to indicate the time something becomes invalid. For example, "The initial 25 working day review period under the European Union merger regulations expires "expiration by" the Commission."
What does "expiration by" mean in the context of financial options?
In finance, "expiration by" refers to the date an option contract becomes void. For instance, "Traders buying up the calls may profit ahead of "expiration by" selling the contracts at a more expensive premium."
Are there alternatives to using "expiration by" that have a similar meaning?
Yes, you can use alternatives like "expiry at", "termination due to", or "deadline for" depending on the specific context.
Is it grammatically correct to use "expiration by"?
Yes, "expiration by" is grammatically correct and widely used to specify when something will expire in relation to a particular time or event.
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
4.5/5
Expert rating
Real-world application tested