Entry 1 sense Webster, 1913 Overlord /ōv'-ẽrl-ôrdˌ/ · O·ver·lord · IPA /ˈəʊvə(ɹ)lɔː(ɹ)d/ 01 n. One who is lord over another or others; a superior lord; a master. 1. One who is lord over another or others; a superior lord; a master.