An ideogram is a visual symbol that represents an idea or concept. It is a form of written communication that uses pictures or symbols to convey meaning. Ideograms are commonly used in languages such as Chinese and Japanese, where each character represents a word or an idea. They are also used in various contexts, such as in mathematics, programming, and graphic design, to represent concepts or instructions. Ideograms can be a powerful tool for communication as they can convey meaning quickly and efficiently, especially when language barriers exist.