brain ‧ wave /ˈbreɪnweɪv/ BrE AmE noun [countable]
1 . British English a sudden clever idea SYN brainstorm American English :
I’ve had a brainwave! Let’s go this weekend instead.
2 . an electrical force that is produced by the brain and that can be measured
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THESAURUS
▪ idea something that you think of, especially something that you could do or suggest:
I think that’s an excellent idea.
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Let me know if you have any good ideas.
▪ thought something that comes into your mind:
The thought had entered my mind that he might be lying.
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It was a worrying thought.
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She was lost in her thoughts.
▪ impression the idea that you have in your mind about what someone or something is like:
What was your impression of him?
▪ inspiration a good and original idea, which makes you think of doing or creating something:
Where did you get your inspiration from for the book?
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He suddenly had a flash of inspiration.
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The design for the house was entirely the inspiration of the architect.
▪ brainwave British English , brainstorm American English a sudden new and clever idea, especially one that solves a problem:
I thought I’d have to sell the house, but then I had a brainwave.
▪ concept an idea of how something is, or how something should be done:
Concepts of beauty are different in different cultures.
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the traditional concept of marriage
▪ notion an idea about life or society, especially one that is a little silly or old-fashioned:
There is no evidence to support the notion that poverty is caused by laziness.