A totally empty space (containing neither air nor anything else) is called a vaccum.
vacuum
A vacuum is a space that is entirely empty of matter or air. It has extremely low pressure, so there are no particles or atoms present. This is different from outer space, which still contains some particles, such as gas and dust.
That is called a vacuum.
A space that contains no matter is called a vacuum. It is a region devoid of particles and energy, creating a near-perfect empty space.
An empty space - or a space that has a reasonable low density of matter. For example, if an enclosed space contains air and you pump most of it out, so that the pressure is much lower than the surrounding air, it could be called a vacuum.
the universe
Ullage is the name of the space to which you refer.
The word universe is the name that describes everything in space.
The larger the particle, the more space/air there is around it.
vacuum or void
It's almost a vacuum, it contains no air.
space
That sounds like the description of a vacuum. However, please note that "No air or gas" is not actually possible; the term "vacuum" really refers to a space that contains SIGNIFICANTLY LESS gas than we normally have in our atmosphere.
windows name
Title Bar
the spongy layer has alot of air spaces so gases can diffuse in and out of the leaf easily
A whole chili pepper contains an air space, so will float on water.