Egghead (7) A brainstorm is a sudden new idea that seems to come to someone from out of nowhere. "Brainstorming" is a group activity that to find a sudden new idea to solve a problem. brainpower by "brainstorming" in this way often produces good solutions.    ´Ù¶ô¿ø ÊÊ 'Voice of America'¿¡¼­ ¹ßÃéÇÑ ³»¿ëÀÔ´Ï´Ù.