Powerful describes someone or something that has great strength, influence, or ability to make things happen. A powerful engine can move a heavy truck up a steep hill. A powerful leader can inspire thousands of people to work together toward a goal. A powerful storm can knock down trees and flood streets.

Power comes in many forms. Physical power might mean lifting heavy weights or running fast. But a quiet scientist making a breakthrough discovery is powerful too, because her ideas can change how we understand the world. A well-written story can be powerful if it moves readers to tears or makes them think differently about something important.

When someone has power over others, they can make decisions that affect many people. A principal has power in a school. A judge has power in a courtroom. Having power brings responsibility, including using it fairly.

You can also feel powerful in your own life when you work hard to develop a skill, overcome a challenge, or stand up for what's right. That kind of personal power grows from within and belongs completely to you.