IPA: /ˈbreɪnˌstɔːrmɪŋ/
KK: /ˈbrɛnˌstɔrmɪŋ/
A way for a group of people to come together and share their ideas to solve a problem or create new solutions.
During the meeting, we spent an hour brainstorming new marketing strategies.
Brainstorming is formed from "brain" (from Old English "brægen", meaning the organ of thought) and "storming" (from the verb "storm", meaning to attack or assault). The term describes the act of attacking a problem with ideas generated by the brain.
Think of using your 'brain' to 'attack' a problem with a flurry of ideas — that's what brainstorming means.