idea (EN)

noun

noun “idea”

1. a thought or suggestion about what to do
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   She had a great idea for the party.
2. a mental image or picture of something
   He had a clear idea of the finished design.
3. knowledge of a fact
   I had no idea he was so famous.
4. (often in the plural) an opinion
   She has some strange ideas about the project.
5. (philosophy) a concept or pure form in philosophical thinking
   Plato wrote about the idea of justice.