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
is lost
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is lost" is grammatically correct and can be used in written English.
It is typically used as part of the passive voice to describe something that has been misplaced or cannot be found. Example: "The key to the safe is lost, and we need to find it before the meeting tomorrow."
✓ Grammatically correct
News & Media
Academia
Science
Alternative expressions(20)
will be assembled
is deserved
will be interrogated
is predicated
needs refinement
deserves to be done
will be reinvigorated
is required to be done
ought to be done
is needed
will be accelerated
benefits needed
will be desired
has to be executed
is essential
will be understood
is unrecoverable
needs to be done
is engendered
is necessary
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
— is lost.
News & Media
All is lost, all is lost.
News & Media
What's lost is lost".
News & Media
Evidence is lost.
News & Media
Bree is lost.
News & Media
All is lost.
News & Media
Their cause is lost.
News & Media
He is lost.
News & Media
Discipline is lost.
News & Media
The text is lost.
News & Media
No, it is lost.
Academia
Expert writing Tips
Best practice
When using "is lost", ensure the subject is clearly defined to avoid ambiguity. For example, instead of "Hope is lost", specify "All hope is lost" for clarity.
Common error
Avoid using "is lost" with plural subjects. The correct form for a plural subject is "are lost". For example, instead of "The keys is lost", use "The keys are lost".
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is lost" primarily functions as a verb phrase in the passive voice, indicating a state of being where something has been misplaced, ruined, or is no longer accessible. As Ludwig AI confirms, it's grammatically correct and commonly used.
Frequent in
News & Media
45%
Academia
28%
Science
15%
Less common in
Wiki
5%
Encyclopedias
2%
Formal & Business
5%
Ludwig's WRAP-UP
In summary, the phrase "is lost" is a grammatically correct and very common expression used to indicate that something is missing, ruined, or no longer available. Ludwig AI confirms its grammatical correctness, and the numerous examples provided by Ludwig demonstrate its widespread usage across diverse contexts, including News & Media, Academia, and Science. When using this phrase, ensure clear subject-verb agreement and consider alternative phrasings like "is missing" or "has vanished" to add nuance or clarity. Avoid misusing it with plural nouns.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is gone
A simple way to state something is no longer present.
is missing
Suggests something is not where it should be and cannot be found.
is misplaced
Indicates something put in the wrong place.
has vanished
Indicates a disappearance, often sudden or mysterious.
has disappeared
Indicates that something has ceased to be visible or present.
is unrecoverable
Emphasizes that something cannot be regained or restored.
is irrecoverable
Highlights that something is not capable of being recovered or regained.
is irretrievable
Highlights the impossibility of getting something back.
is ruined
Focuses on the damage or destruction of something.
is forfeited
Implies a loss due to a rule or consequence.
FAQs
What does "is lost" mean?
"Is lost" generally means something cannot be found, has been misplaced, or is no longer available. It can also metaphorically refer to a state of confusion or hopelessness.
How can I use "is lost" in a sentence?
What can I say instead of "is lost"?
You can use alternatives like "is missing", "is gone", or "has vanished" depending on the context.
Is "is lost" the same as "are lost"?
No, "is lost" is used with singular subjects, while "are lost" is used with plural subjects. For example, "The document is lost", but "The documents are lost".
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested