cybernaut Syllabification: (cy·ber·naut)Pronunciation: /ˈsībərˌnôt, -ˌnät/Definition of cybernaut noun Computing a person who wears sensory devices in order to experience virtual reality. a person who uses the Internet. Origin: 1990s: from cyber-, on the pattern of astronaut and aeronautcybernaut in other Oxford dictionaries Definition of cybernaut in the British & World English dictionary