Word family noun ground underground grounding grounds adjective goundless underground ≠ overground grounded verb ground adverb underground
From Longman Dictionary of Contemporary Englishovergroundo‧ver‧ground /ˈəʊvəɡraʊnd $ ˈoʊvər-/ adjective [only before noun] used to describe a train system that runs on the surface of the ground rather than below it OPP underground an overground railway 