I have an idea vs Notion

When to use each in English, with meaning, register, and examples.

I have an idea

Top 2,000 (common)

Notion

Top 2,000 (common)B2noun
 I have an ideaNotion
Pronunciation🇬🇧 //aɪ hæv ən aɪˈdɪə//🇺🇸 //aɪ hæv ən aɪˈdiə//🇬🇧 /["/ˈnəʊʃn/"]/🇺🇸 /["/ˈnəʊʃn/"]/
MeaningI thought of something.An idea or belief about something.
ExampleDuring the meeting, I have an idea that could solve our problem.The notion of freedom varies greatly between cultures.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR level-B2
Part of speechnoun
Collocationshave an idea about, have an idea for, have an idea in mindabsurd, foolish, misguided, have, challenge, debunk, notion of
Antonyms-reality, fact
Common mistakesSaying 'I have a thought' instead of 'I have an idea.', Using it too formally in casual conversations., Confusing it with 'I think of an idea.'Confusing 'notion' with 'motion' (they sound similar)., Using 'notion' when 'fact' is intended., Overusing 'notion' in casual conversations.
Usage notesUse this phrase when you want to share your thoughts or suggestions. It fits well in casual and professional contexts.Use 'notion' in contexts where discussing concepts or beliefs. This word is appropriate in both spoken and written language but leans more towards academic or philosophical discussions.

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I have an idea

Frequently asked questions: I have an idea vs Notion

What's the difference between I have an idea and Notion?

I have an idea: I thought of something. Notion: An idea or belief about something.

Can you show an example of each?

I have an idea: During the meeting, I have an idea that could solve our problem. Notion: The notion of freedom varies greatly between cultures.

Can I use I have an idea and Notion interchangeably?

Not always. I have an idea and Notion are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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