cyberstalkingcy‧ber‧stalk‧ing /ˈsaɪbəˌstɔːkɪŋ $ -bərˌstɒːk-/ noun [uncountable]the illegal use of the Internet, email, or other electronic communication systems to follow someone or threaten them: The state’s first cyberstalking laws went into effect a little over a year ago.—cyberstalker noun [countable]