The word "vacuum" refers to a space that is empty of any matter or air. It is a state where there is nothing present, like a completely empty room. Full definition
It also includes a built in vacuum cleaner which means dirt and crumbs from the kids will quickly become a thing of the past. (hendrickchryslerdodgejeepramofconcord.com)
Did you know that even the cheapest of vacuum cleaners these days usually have built - in extra functions? (thefashionablehousewife.com)
The whole atmosphere between the surface and the near vacuum of space is filled with CO2. (wattsupwiththat.com)