American English

Definition of ground floor noun from the Oxford Advanced American Dictionary

     

    ground floor

     noun
    noun
     
     
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  1. 1the floor of a building that is at the same level as the ground outside (used especially about public buildings) synonym first floor
  2. 2 a ground-floor window I live on the ground floor. Thesaurusfloorground land earthThese are all words for the surface that you walk on.floor the surface of a room that you walk on:She was sitting on the floor watching TV.ground (often the ground) the solid surface of the earth that you walk on:I found her lying on the ground. The rocket crashed a few seconds after it left the ground.land the surface of the earth that is not sea:It was good to be back on dry land again. They fought both on land and at sea.earth (often the earth) the solid surface of the world that is made of rock, soil, sand, etc.:You could feel the earth shake as the truck came closer.ground, land, or earth?Ground is the normal word for the solid surface that you walk on when you are not in a building or vehicle. You can use earth if you want to draw attention to the rock, soil, etc. that the ground is made of. Land is used only when you want to contrast it with the sea:the land beneath our feet feel the land shake travel by ground/earthPatterns on/under the floor/ground/earth bare floor/ground/earth to drop to/fall to the floor/the ground/(the) earth to reach the floor/the ground/land
  3. Idioms
    be/get in on the ground floor
     
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    to become involved in a plan, project, etc. at the beginning
See the Oxford Advanced Learner's Dictionary entry: ground floor