What is the meaning of the word "technical"?

Definitions:

characterizing or showing skill in or specialized knowledge of applied arts and sciences adjective
- a technical problem
of or relating to a practical subject that is organized according to scientific principles adjective
- technical college
of or relating to or requiring special knowledge to be understood adjective
- technical terminology
of or relating to technique or proficiency in a practical skill adjective
- My technical innovation is in brushwork, which I am known for around the world.
resulting from or dependent on market factors rather than fundamental economic considerations adjective
- analysts content that the stock market is due for a technical rally