the huge desert voids|the emptiness of outer space|without their support he'll be ruling in a vacuum
3. a region that is devoid of matter
4. an electrical home appliance that cleans by suction
5. A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum.