Word forms: plural ideograms1. countable nounAn ideogram is a sign or symbol that represents a particular idea or thing rather than a word. The writing systems of Japan and China, for example, use ideograms.
2. countable nounIn languages such as English which are written using letters and words, an ideogram is a sign or symbol that can be used to represent a particular word. %, @, and & are examples of ideograms.