cybernautPronunciation: /ˈsʌɪbənɔːt/Definition of cybernaut noun 1an expert or habitual user of the Internet. 2a person who uses computer technology and sensory devices to experience virtual reality. Origin: 1960s (in the senses 'robot' and 'cyborg'): from cyber-, on the pattern of astronautcybernaut in other Oxford dictionaries Definition of cybernaut in the US English dictionary