tachygraphy Syllabification: (ta·chyg·ra·phy)Pronunciation: /taˈkigrəfē, tə-/Definition of tachygraphy noun stenography or shorthand, especially that of ancient or medieval scribes. Derivatives tachygraphicPronunciation: /ˌtakiˈgrafik/ adjective tachygraphy in other Oxford dictionaries Definition of tachygraphy in the British & World English dictionary