ideogramEnglishOxford New American Dictionaryideogram /ˈidēəˌɡram, , ˈɪdiəˌɡræm , ˈīdēəˌɡram, ˈaɪdiəˌɡræm / ▸ noun a written character symbolizing the idea of a thing without indicating the sounds used to say it, e.g., numerals and Chinese characters. – ORIGIN mid 19th century : from Greek idea ‘form’ + -gram1.