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Which phrase refers to a concept that exists only in theory?

concept

[kon-sept] / ˈkɒn sɛpt /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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As a "concept car" intended to show Citroen's direction of travel, it is not yet ready to go on sale but the plan is to have a version in showrooms by 2028.

From BBC ● Oct. 11, 2026

In that proof of concept study, researchers analyzed walking data from 10 healthy adults and demonstrated that a machine learning system could track changes in estimated knee forces across different walking patterns.

From Science Daily ● Oct. 11, 2026

The concept was presented as a more convenient way to get food into customers’ hands.

From Salon ● Oct. 11, 2026

“That is the reason why the whole concept fails.”

From The Wall Street Journal ● Oct. 8, 2026

The problem with this view is that it takes the concept of ‘reality’ for granted, whereas what we need is a history of the changing nature of reality.

From "The Invention of Science" by David Wootton

His thematic concepts and narrative red herrings rely on the viewer’s presence.

From Salon ● Oct. 5, 2026

Escher is also the first to ever explore the mathematical underpinnings of his mind-bending scenes, looking at the numerical, geometric and computational concepts that lie at the heart of his most iconic images.

From The Wall Street Journal ● Sep. 27, 2026

“You’ve got the native language as a scaffold for these young kids who are just beginning to acquire complex concepts, who are just beginning to understand the world around them,” Pompa said.

From Los Angeles Times ● Sep. 24, 2026

Executives at other branded-goods companies in recent months have talked up their newest concepts: silk diapers, Doritos with protein, Pepsi with fiber, Capri Sun with electrolytes and “hydrating” hot chocolate.

From MarketWatch ● Sep. 16, 2026

In the laboratory, I did not truly understand the concepts of night and day.

From "A Rover's Story" by Jasmine Warga




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