sysop /ˈsɪsˌɒp/noun 2verb 2forms 4 noun2 •An administrator on a wiki. •(Internet) A system operator, especially someone who administers an online communications system or bulletin board. verb2 •To work as a sysop. •(rare) To grant someone sysop privileges. formssysopped · sysopping · sysops · SYSOPs