brainstorm >> /ˈbɹeɪnstɔː(ɹ)m/
Definition: [noun] A sudden thought, particularly one that solves a long-standing problem.
Example: I had been working on the problem for weeks, and then I had a brainstorm and saw that the solution was easy.
Definition: [noun] A session of brainstorming, investigating a problem to try to find solutions.
Definition: [noun] An unexpected mental error.
Definition: [verb] To investigate something, or solve a problem using brainstorming.
Definition: [verb] To participate in a brainstorming session.