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Definition brainstorm in British English

brainstorm noun

[countable] noun
/ˈbreɪnˌstɔː(r)m/
1

a situation in which you cannot think clearly so that you do or say something silly

Example

Sorry - I must have been having a brainstorm.

Synonyms and related words
3

a brainwave

Synonyms and related words
Definition brainstorm in British English