(automotive) The shortest distance between a level surface, and any part (other than tires or equivalent) of the underside of a vehicle standing on that surface.

plural of ground beef

(sociology) Any theory that is based on observation of social phenomena

A landfill. / (figuratively) Any place where unwanted items are sent. / (taxonomy) A presumably polyphyletic supraspecific taxon where species of unclear affinities are placed.

A fighting style, primarily in mixed martial arts, in which one pins one's opponent and then strikes him or her repeatedly.

simple past tense and past participle of ground truth

Any of the Brachypteraciidae, a small family of non-migratory near-passerine birds restricted to Madagascar, and related to the kingfishers, bee-eaters and rollers.

(law, Scotland) An estate created in land by a vassal who instead of selling his land outright reserves an annual ground rent, which becomes a perpetual charge upon the land.

Any of a large cosmopolitan family of beetles, Carabidae. / Used other than figuratively or idiomatically: see ground, beetle.

Glechoma hederacea, an aromatic, perennial, evergreen creeper of the mint family Lamiaceae.