1. a person who participates in or leads a brainstorming session; someone who generates ideas creatively
Usage: informal; commonly used in business and educational contexts
2. a brainstorming session or meeting itself
Usage: informal; less common than the first sense

Examples

• She's a natural brainstormer who always comes up with innovative solutions.
• Our team hired a professional brainstormer to help us develop new marketing strategies.
• The company organized a brainstormer to generate ideas for the new product launch.
• He's known as the office brainstormer because he never runs out of creative suggestions.
• We scheduled a brainstormer for next Tuesday to tackle the project challenges.
• Every good brainstormer knows that no idea is too wild during the initial phase.