idea

[ahy-dee-uh, ahy-deeuh]

noun

1. any conception existing in the mind as a result of mental understanding, awareness, or activity.

2. a thought, conception, or notion.

   That is an excellent idea.

3. an impression.

   He gave me a general idea of how he plans to run the department.

4. an opinion, view, or belief.

   His ideas on raising children are certainly strange.

   Synonyms: judgment, sentiment

5. a plan of action; an intention.

   the idea of becoming an engineer.

6. a groundless supposition; fantasy.

7. Philosophy.

   1. a concept developed by the mind.

   2. a conception of what is desirable or ought to be; ideal.

   3. Also called form. (initial capital letter),  an archetype or pattern of which the individual objects in any natural class are imperfect copies and from which they derive their being.

   4. Kantianism.,  idea of pure reason.

8. Music.,  a theme, phrase, or figure.

9. Obsolete.

   1. a likeness.

   2. a mental image.

idea

¹

/ aɪˈdɪə /

noun

1. any content of the mind, esp the conscious mind

2. the thought of something

   the very idea appals me

3. a mental representation of something

   she's got a good idea of the layout of the factory

4. the characterization of something in general terms; concept

   the idea of a square circle is self-contradictory

5. an individual's conception of something

   his idea of honesty is not the same as yours and mine

6. the belief that something is the case

   he has the idea that what he's doing is right

7. a scheme, intention, plan, etc

   here's my idea for the sales campaign

8. a vague notion or indication; inkling

   he had no idea of what life would be like in Africa

9. significance or purpose

   the idea of the game is to discover the murderer

10. philosophy

    1. a private mental object, regarded as the immediate object of thought or perception

    2. a Platonic Idea or Form

11. music a thematic phrase or figure; motif

12. obsolete,  a mental image

13. to become ambitious, restless, etc

14. not what one regards as (hard work, a holiday, etc)

15. that is worth considering

16. that is preposterous, unreasonable, etc

Idea

²

/ aɪˈdɪə /

noun

1. another name for Form

Usage

It is usually considered correct to say that someone has the idea of doing something, rather than the idea to do it: he had the idea of taking (not the idea to take ) a short holiday

Other Word Forms

• idealess adjective
• preidea noun
• subidea noun

Word History and Origins

Origin of idea¹

First recorded in 1400–50; from Late Latin from Greek idéā “form, pattern,” equivalent to ide- (stem of ideîn “to see”) + -ā feminine noun ending; replacing late Middle English idee from Middle French from Late Latin, as above; akin to wit ¹

Word History and Origins

Origin of idea¹

C16: via Late Latin from Greek: model, pattern, notion, from idein to see

Idioms and Phrases

see bright idea; put ideas in someone's head; what's the idea.

Example Sentences

This new discovery turns that idea on its head and deepens the debate over one of biology's central mysteries: how and why genome size changes during the evolution of life.

Read more on Science Daily

But when it happened to her father, the weight of facing the power of China's government hit her: "I have no idea what I'm supposed to do."

Read more on Barron's

Hussein also promoted a new idea among Zaidis of a singular leader, known as the “Guiding Eminence,” who was chosen by God to rule.

Read more on The Wall Street Journal

"There's this idea that knowledge management becomes less important because generative AI can solve the fact that their knowledge is not particularly well organised, but actually the opposite is the case," adds Ms Potosky.

Read more on BBC

Mr. Deneen views the American Founding as a set of liberal ideas, influenced by Thomas Hobbes and John Locke, that gave us the devil-may-care economics that has ultimately spoiled the country.

Read more on The Wall Street Journal

Related Words

• belief 
• concept 
• conception 
• conclusion 
• design 
• feeling 
• form 
• intention 
• interpretation 
• meaning 
• notion 
• objective 
• opinion 
• perception 
• plan 
• scheme 
• sense 
• solution 
• suggestion 
• theory 

When To Use

What are other ways to say idea?

An idea is any conception existing in the mind as a result of mental understanding, awareness, or activity. How is idea different from thought, conception, and notion? Learn more on Thesaurus.com.