Floors symbolize something you must overcome. For example, to dream of black and white floor tiles means you are being asked to overcome extremism (seeing things as black and white).
Floors in kitchens, bathrooms or when the state of the floor is the focus, can also symbolize your elimination system. This is particularly the case if the floor is dirty or something has spilled onto it. For example, if milk boils over on the cooker and spills onto the floor it means you have an intolerance to milk and your system cannot eliminate it properly from your body.
Sitting on a floor in a dream brings you back to your childhood as that is when you used to sit on the floor.
