An example of vacuum is to clean the dirt off the carpet using a vacuum cleaner.
An example of a vacuum is a space with nothing in it.
An example of a vacuum is something used to clean up dirt on a floor.
Origin of vacuum
- Latin empty space from neuter of vacuus empty from vacāre to be empty euə- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Latin vacuum (“an empty space, void"), noun use of neuter of vacuus (“empty"), related to vacare (“be empty")