key idea

USAGE SUMMARY

"key idea" is a grammatically correct and commonly used phrase in written English.
It refers to the main or most important concept or theme of a sentence, paragraph, or larger piece of writing. Example: The key idea of the article is that the environment plays a crucial role in the health of our planet.

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

The key idea is horizontality.

The New York Times

So the key idea here is anticipation.

Yale University

The key idea of a subspace.

Massachusetts Institute of Technology

The key idea behind HS is as follows.

Probabilistic Engineering Mechanics

The key idea here is exposure, Dr. Septimus said.

The New York Times

His key idea, he said, was to "avoid sentimentality".

The Guardian

So, that is the key idea of Markowitz's portfolio management.

Yale University

The key idea is a boundary element method to resolve the electrostatic fields.

Acta Materialia

The key idea is to exploit body movement of the robot.

Robotics and Autonomous Systems

The key idea in this method is to randomize the ignition temperatures in suitable domains.

Journal of Computational Physics

We extend the key idea behind the generalized Petviashvili method of [T.I.

Journal of Computational Physics

Expert writing Tips

Best practice

When using "key idea", ensure it accurately reflects the most crucial takeaway. Use it to signpost the central argument to guide the reader effectively.

Common error

Avoid using "key idea" as a mere placeholder. Instead, ensure the concept following the phrase is genuinely insightful and well-supported. Generic claims weaken its impact.

Linguistic Context

The phrase "key idea" functions as a noun phrase, typically serving as a subject complement or object within a sentence. Ludwig examples show it introducing central concepts across various domains.

Expression frequency: Very common

Frequent in

Science

45%

News & Media

20%

Academia

15%

Less common in

Formal & Business

10%

Encyclopedias

5%

Wiki

5%

Ludwig's WRAP-UP

The phrase "key idea" is a versatile and commonly used noun phrase that serves to introduce the most important concept or central point. According to Ludwig, its grammatical status is correct. It appears frequently in scientific, news, and academic contexts. To enhance clarity, ensure the concept following "key idea" is substantial and well-supported. Alternatives such as "central concept" or "main theme" can add variety. By using "key idea" judiciously, you can effectively guide your reader to the core message.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

central concept

Focuses on the core conceptual element, emphasizing its centrality.

fundamental concept

Highlights the concept as foundational and essential.

main theme

Highlights the overarching subject or topic, suggesting a broader scope.

core principle

Emphasizes the fundamental rule or belief underlying a concept.

primary notion

Stresses the basic understanding or belief about something.

underlying principle

Stresses the fundamental concept that supports a system or theory.

basic premise

Focuses on the foundational assumption or proposition.

essential element

Underscores the crucial and indispensable aspect.

chief aspect

Emphasizes the most important feature or characteristic.

guiding principle

Implies that the principle provides direction or a foundation.

FAQs

How can I use "key idea" effectively in a sentence?

Use "key idea" to introduce the most important concept or takeaway. For example, "The "key idea" is to focus on sustainable practices."

What are some alternatives to using the phrase "key idea"?

You can use phrases such as "central concept", "main theme", or "core principle" depending on the context.

How does "key idea" differ from "main point"?

"Key idea" often refers to a fundamental concept or takeaway, whereas "main point" might be a more specific argument or assertion within a discussion or text.

Is it appropriate to use "key idea" in formal writing?

Yes, "key idea" is suitable for formal writing. It is a clear and concise way to indicate the central concept. However, ensure the idea itself is substantial and well-supported.