from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The floor of a building at or nearest ground level.
  • n. Informal The beginning of a venture, especially regarded as a position of advantage: investors vying to get in on the ground floor of a development project.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The floor of a building closest to ground level; first floor (US)
  • n. The initial stage of a project

from the GNU version of the Collaborative International Dictionary of English

  • n. the floor of a house most nearly on a level with the ground; -- called also in America, but not in England, the first floor.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. on the floor closest to level with the ground
  • n. the floor of a building that is at or nearest to the level of the ground around the building
  • n. becoming part of a venture at the beginning (regarded as position of advantage)


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