Longman Dictionary of Contemporary English homepage

brainwave

 noun
     
Related topics: Animals, Human
brain‧wave [countable]
1 British English a sudden clever idea [= brainstorm American English]
I've had a brainwave! Let's go this weekend instead.
2HBH an electrical force that is produced by the brain and that can be measured
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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