Why do Brits say floor instead of ground?

Why do Brits say floor instead of ground? “Floor” was an archaic word for “ground” centuries ago. And according to the Oxford English Dictionary, “floor” has been used in the game of cricket to refer to the ground (but this must be an uncommon usage, since it doesn’t currently appear in any standard British dictionaries).

“Floor” was an archaic word for “ground” centuries ago. And according to the Oxford English Dictionary, “floor” has been used in the game of cricket to refer to the ground (but this must be an uncommon usage, since it doesn’t currently appear in any standard British dictionaries).