Hi again,
A hole by my definition is, "The orderly absence of media and its interpretation",
however the existance (or lack of existance) of holes (as in holes in the ground)
has been the subject of debate for ages.
Semiconductor holes are almost the same if you view the electron as
a physical object, but if you view the electron as a charge then the
hole takes on a new meaning because it has a positive charge. This
positive charge is again due to the absence of media (the media being
the electrons) but there is also a charge associated with it so it takes
on a new meaning in itself.
Some examples are in the following diagram.
Fig 1 shows what looks like no holes, while Fig 2 shows what looks like
a single hole. What is this round object if there are no holes?
In language we are able to create nouns for many things that dont
really exist physically.
Fig 3 shows that we can even have holes of different shapes.
Fig 4 can be described as having no holes at all (no orderly absence)
unless we look closer and then we might say that it has lots of tiny
holes, while Fig 5 can be said to have either one hole or lots of tiny
holes and one big hole.
For more thoughts on the concept of holes take a look here:
Holes (Stanford Encyclopedia of Philosophy)
Here is the diagram: