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
lost idea
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "lost idea" is correct and usable in written English.
It can be used to refer to a concept or thought that has been forgotten or is no longer accessible. Example: "During the brainstorming session, I had a brilliant thought, but it quickly turned into a lost idea as I struggled to articulate it."
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(1)
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
2 human-written examples
The reason I veered on to the topic of CGI is because Audiard is particularly attached to a now largely lost idea of cinema directly showing us the real: the example he gave me, when we last discussed it, was the sight of Katharine Hepburn manifestly shedding actual tears in The African Queen.
News & Media
And as Times Square is in so many ways the incarnation of urban life itself, so nostalgia for Times Square is nostalgia for a lost idea of urbanness, or of urbanity -- for a time, before the advent of television and the suburbs, and before riots and drug wars, when everyone knew that city life was the best life of all.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
When working at a sector skills council I also experienced the reluctance of a number of key players to share information precisely for the reason other posters have identified – losing ideas, market position and so on.
News & Media
But politicians who talk up "libertarian populism" or "opportunity conservatism" or the "Rawlsian lens" and then end by calling for a Balanced Budget Amendment, hard money and a flat tax aren't actually reforming the Republican Party; they're just wrapping losing ideas in slightly smarter rhetoric than poor Mitt Romney was ever able to come up with.
News & Media
At the end of each phase, all the Watts invested in the losing ideas are redistributed proportionately to the investors in the winning idea.
News & Media
"Eventually I lost the idea that I could have a career," she said.
News & Media
We lost the idea of the Sabbath as a day of rest long ago.
News & Media
The trouble was he never quite lost that idea - a characteristic Jarman film such as The Tempest exists in a mood of raucous, cheerful camp.
News & Media
Double Bind is enormously engaging, beguiling and generous, in that it is a vast work in which the artist never lost his idea of privileging the individual spectator.
News & Media
"We bought it from a Paris family that had had it for generations, but lost the idea of what it was," he said.
News & Media
I can only assume Bailey lost all idea of whereabouts he was as he didn't even try and get his foot back over the line.
News & Media
Expert writing Tips
Best practice
When using "lost idea", consider the context carefully to ensure it clearly communicates the sense of something forgotten, abandoned, or no longer relevant. Alternatives like "forgotten concept" might be more appropriate depending on the specific meaning you intend to convey.
Common error
Avoid using "lost idea" interchangeably with phrases like 'bad idea' or 'unpopular idea'. "Lost idea" specifically refers to an idea that was once present but is now gone or forgotten, not necessarily one that is inherently flawed or disliked.
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "lost idea" functions primarily as a noun phrase, where 'lost' acts as an adjective modifying the noun 'idea'. Ludwig AI's analysis indicates that it is used to describe a concept or thought that is no longer remembered, accessible, or relevant.
Frequent in
News & Media
40%
Wiki
30%
Science
10%
Less common in
Formal & Business
7%
Reference
7%
Encyclopedias
6%
Ludwig's WRAP-UP
The phrase "lost idea" effectively conveys the notion of a concept or thought that has been forgotten, abandoned, or is no longer relevant. Ludwig AI confirms that the phrase is grammatically correct and usable in written English. Its frequency is uncommon, appearing primarily in News & Media and Wiki contexts. When using "lost idea", it's important to consider the specific nuance you wish to convey, as alternatives such as "forgotten concept" or "abandoned notion" might be more precise. Avoid confusing it with phrases like 'bad idea', which carries a different meaning. In summary, while grammatically sound and understandable, the phrase's usage should be deliberate to accurately represent the intended meaning.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
forgotten concept
Emphasizes the aspect of being forgotten or no longer remembered.
unremembered idea
Highlights that the idea is not recalled or brought to mind.
abandoned notion
Focuses on the act of deliberately giving up or rejecting an idea.
discarded thought
Highlights the idea being considered and then rejected as not useful.
receded concept
Suggests the idea has faded or diminished in importance or relevance.
vanished idea
Implies the idea has disappeared completely, often unexpectedly.
eclipsed concept
Signifies that the idea has been overshadowed by something more prominent.
obsolete concept
Indicates the idea is outdated and no longer applicable or useful.
outmoded thought
Similar to 'obsolete concept', but emphasizes the idea is no longer fashionable or current.
bygone notion
Implies that the idea belongs to the past and is no longer relevant in the present.
FAQs
How can I use "lost idea" in a sentence?
You can use "lost idea" to describe a concept that has been forgotten or is no longer considered, such as, "The project suffered when the original vision became a "lost idea"".
What is a semantically similar substitute for "lost idea"?
Alternatives to "lost idea" include "forgotten concept", "abandoned notion", or "discarded thought", each carrying a slightly different nuance.
Is "lost idea" the same as "bad idea"?
No, "lost idea" refers to an idea that has been forgotten or abandoned, while "bad idea" describes a concept that is fundamentally flawed or unwise. They are not interchangeable.
Can "lost idea" be used in formal writing?
Yes, "lost idea" is appropriate for formal writing. However, consider the context and choose the most precise synonym if necessary for clarity and impact. For instance, "receded concept" might be a better fit in some academic contexts.
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
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested