What is the meaning of Brainstorm?

To investigate something, or solve a problem using brainstorming.

To participate in a brainstorming session.

To think up (ideas); especially, to do so creatively.

A sudden thought, particularly one that solves a long-standing problem.

A session of brainstorming, investigating a problem to try to find solutions.

An unexpected mental error.

Alternative form of brain storm (activity in the brain, such as a seizure or convulsion)

Source: wiktionary.org