The definition of a high performance fan is a fan that is designed to move air more efficiently than standard fans. These fans are typically larger in size and have higher RPMs (revolutions per minute) than standard fans. They are designed to move more air at a faster rate, which can be beneficial in many ways. High performance fans can be used to cool down a room more quickly, reduce noise levels, and even improve air quality. They are also more energy efficient than standard fans, as they use less electricity to move the same amount of air. High performance fans are ideal for larger spaces, as they can move air more quickly and effectively. They are also great for cooling down electronics, as they can provide a steady stream of cool air to keep components from overheating.