vacuum

noun pl. vacuums or vacua

1. a space with nothing at all in it; completely empty space
2. 1. an enclosed space, as that inside a vacuum tube, out of which most of the air or gas has been taken, as by pumping
   2. the degree to which pressure has been brought below atmospheric pressure
3. a space left empty by the removal or absence of something usually found in it; void: often used figuratively
4. ☆ vacuum cleaner

adjective

1. of a vacuum
2. used to make a vacuum
3. having a vacuum; partially or completely exhausted of air or gas
4. working by suction or the creation of a partial vacuum

transitive verb, intransitive verb