The foundation; the basic or fundamental parts that support or allow for the rest.

(slang, Britain, Canada, Australia, New Zealand) unpleasant, dirty, slovenly or offensive.

A small cave. / An artificial cavern-like retreat. / A Marian shrine, usually built in a cavern-like structure.

(baseball) A batted ball that bounces one or more times on the infield; a grounder. / (lacrosse) A loose ball that is on the ground during play.

(baseball) A ground ball. / A fruit that has fallen to the ground rather than being picked; a windfall. / One of the large stones forming the base of a Cornish hedge.

Of, pertaining to, or having grooves. / (dated) Set in one's ways.

(dated, slang) Cool, neat, interesting, fashionable.

(dated, slang) A trendy and fashionable person.

(electronics) To provide proper grounding for a circuit. / (baseball) To become out by hitting a ground ball which is fielded and leads to a force or tag of a runner.

(baseball) An instance of grounding out.