cybersex /ˈsaɪbɚsɛks/verb 2noun 1forms 3 verb2 •To exchange explicit sexual experiences online by means of text or multimedia. •To engage in sexual activity, usually masturbation, while communicating online with another person. noun1 •A virtual sexual encounter in which two or more persons connected remotely by means of a computer network send one another sexually explicit messages simulating a sexual experience.He went to his office and logged online to have cybersex for more than six hours. — 2001 formscybersexed · cybersexing · cybersexes