OBELISK Meaning of OBELISK in English n.1 a a tapering usu. four-sided stone pillar set up as a monument or landmark etc. b a mountain, tree, etc., of similar shape. 2 OBELUS. Etymology: L obeliscus f. Gk obeliskos dimin. of obelos SPIT(2) Oxford English vocab. Оксфордский английский словарь. 2012