necro UK /ˈnɛkɹəʊ/US /ˈnɛkɹoʊ/verb 2noun 1forms 4 verb2 •(Internet) To make a new post to a forum discussion that has been dormant for a long time, making the thread visible in the list of active topics; to bump.Sorry to necro a comment from three years ago, but … •(Internet, slang) To practice necromancy; to bring back from the dead.“I killed and necroed a couple guards practically every time I went out. My boys have the south gate manned, and they'll be stepping aside any minute now.” — 2018 noun1 •(Internet) Necromancer. formsnecroed · necroing · necroes · necros