Ideas vs Notion

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

Ideas

Top 1,000 (very common)

Notion

Top 2,000 (common)B2noun
Most common: Ideas
 IdeasNotion
Pronunciation🇬🇧 //aɪˈdɪəz//🇺🇸 //aɪˈdɪəz//🇬🇧 /["/ˈnəʊʃn/"]/🇺🇸 /["/ˈnəʊʃn/"]/
MeaningThoughts or plans about what someone wants to do.An idea or belief about something.
ExampleShe shared several innovative ideas during the meeting.The notion of freedom varies greatly between cultures.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR level-B2
Part of speechnoun
Collocationsgenerate ideas, share ideas, come up with ideas, discuss ideas, develop ideasabsurd, foolish, misguided, have, challenge, debunk, notion of
Antonymsfacts, realityreality, fact
Common mistakesConfused with 'ideal' in meaning., Using 'idea' in singular when discussing multiple thoughts., Incorrectly using 'ideas' when referring to single thoughts.Confusing 'notion' with 'motion' (they sound similar)., Using 'notion' when 'fact' is intended., Overusing 'notion' in casual conversations.
Usage notesUse 'ideas' in discussions when brainstorming or suggesting plans. Avoid overly casual phrases in formal settings.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.

Frequently asked questions: Ideas vs Notion

What's the difference between Ideas and Notion?

Ideas: Thoughts or plans about what someone wants to do. Notion: An idea or belief about something.

Which is more common: Ideas and Notion?

Ideas is the most common in everyday English.

Can you show an example of each?

Ideas: She shared several innovative ideas during the meeting. Notion: The notion of freedom varies greatly between cultures.

Can I use Ideas and Notion interchangeably?

Not always. Ideas 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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