ETYM Latin, from vacuus empty. Related to Vacuous.
1. A region empty of matter; SYN. vacuity.
2. An electrical home appliance that cleans by suction; SYN. vacuum cleaner.
3. The absence of matter; SYN. vacuity.
Any pressure less than atmospheric pressure.
In general, a region completely empty of matter; in physics, any enclosure in which the gas pressure is considerably less than atmospheric pressure (101,325 pascals). + prikaži više