Dictionary.com defines a vacuum like this:

vac·u·um /ˈvækyum, -yuəm, -yəm/ Pronunciation Key - Show Spelled Pronunciation[vak-yoom, -yoo-uhm, -yuhm] Pronunciation Key - Show IPA Pronunciation noun, plural vac·u·ums for 1, 2, 4–6, vac·u·a /ˈvækyuə/ Pronunciation Key - Show Spelled Pronunciation[vak-yoo-uh] Pronunciation Key - Show IPA Pronunciation for 1, 2, 4, 6; adjective; verb
–noun 1. a space entirely devoid of matter.
2. an enclosed space from which matter, esp. air, has been partially removed so that the matter or gas remaining in the space exerts less pressure than the atmosphere (opposed to plenum).
3. the state or degree of exhaustion in such an enclosed space.
4. a space not filled or occupied; emptiness; void: The loss left a vacuum in his heart.
5. a vacuum cleaner or sweeper.
6. Physics. a state of lowest energy in a quantum field theory.
–adjective 7. of, pertaining to, employing, or producing a vacuum.
8. (of a hollow container) partly exhausted of gas or air.
9. pertaining to a device or process that makes use of a vacuum to accomplish a desired task.
10. noting or pertaining to canning or packaging in which air is removed from the container to prevent deterioration of the contents.
–verb (used with object) 11. to use a vacuum cleaner on; clean with a vacuum cleaner: to vacuum rugs.
12. to treat with any vacuum device, as a vacuum drier.
–verb (used without object) 13. to use a vacuum cleaner: to vacuum in the dining room.

My question is this…at what point volume wise/ encapsulation wise, particle size etc…does something become a vacuum…does this mean that the space between the molecules that make up my body are vacuums? or that space is not a vacuum because it is neither contained, nor void of matter…this has always bothered me….answer on homeboy…answer on