Brainstorm/ˈbreɪnstɔːrm/ Definition 1 of 4Pro Tip 1/3Group Activity Used when multiple people work together to generate ideas. Our team will brainstorm after lunch. Pro Tip 2/3Creative Process Implies an open and creative discussion without immediate criticism of ideas. During our brainstorm, all suggestions are welcome. Pro Tip 3/3Open-Ended Shows that the outcome is not predetermined and any idea can lead to a solution. Let's brainstorm and see where it takes us.