Brainpower/ˈbreɪnpaʊər/ Definition 1 of 2Pro Tip 1/3Individual Usage Refers to a single person's mental abilities, not a group's collective thinking. He used his brainpower to solve complex math equations. Pro Tip 2/3Problem Solving Often used when discussing tasks that require a lot of thinking or smart strategies. The chess tournament really tested the players' brainpower. Pro Tip 3/3Not Physical It's about thinking abilities, not physical strength or stamina. Winning debates relies more on brainpower than on voice projection.