To "define" means to explain the meaning of a word, concept, or term. This process involves providing a clear and concise description that helps others understand what is being referred to. Definitions can vary based on context, and they are often found in dictionaries or academic texts. In addition to words, defining can also apply to ideas, theories, or even objects. For example, to define democracy involves outlining its principles, such as citizen participation and equal representation. A precise definition is essential for effective communication and understanding in various fields, including science, literature, and philosophy.