Origin of brainstorm

1890–95; brain + storm; originally a severe mental disturbance
Related formsbrain·storm·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for brainstorm

British Dictionary definitions for brainstorm

brainstorm

/ (ˈbreɪnˌstɔːm) /

noun

a severe outburst of excitement, often as the result of a transitory disturbance of cerebral activity
British informal a sudden mental aberration
informal another word for brainwave

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012