To "think" means to use your mind to consider, understand, or make decisions about something. It involves processing information, solving problems, and forming ideas. For example, when you are trying to solve a math problem, you think about the numbers and how they relate to each other. This mental activity helps you come up with the right answer. Thinking can also involve creativity, like when an artist imagines a new painting or a writer develops a story. In these cases, imagination plays a key role, allowing people to explore different possibilities and express their thoughts in unique ways.