ground floor

English Thesaurus

1. the floor of a building that is at or nearest to the level of the ground around the building (noun.artifact)

hypernym	:	floor, level, storey, story,
definition	:	a structure consisting of a room or set of rooms at a single position along a vertical scale (noun.artifact)

2. becoming part of a venture at the beginning (regarded as position of advantage) (noun.event)

hypernym	:	beginning,
definition	:	the event consisting of the start of something (noun.event)