I don't want to get on with what defines a hole, especially with a female, but I think that a hole is deeper than it is wide and usually defined as circular.
You think too much.
Partial Definition of hole in English:
1.A hollow place in a solid body or surface.
1.1 An aperture passing through something.
2. A place or position that needs to be filled because someone or something is no longer there.
3. (informal) An unpleasant place.