What is the meaning of the word "fast"?

Definitions:

(of a photographic lens or emulsion) causing a shortening of exposure time adjective
- a fast lens
(of surfaces) conducive to rapid speeds adjective
- a fast road
abstain from certain foods, as for religious or medical reasons verb
- Catholics sometimes fast during Lent
abstain from eating verb
- Before the medical exam, you must fast
acting or moving or capable of acting or moving quickly adjective
- fast film
at a rapid tempo adjective
- the band played a fast fox trot
firmly or closely adverb
- held fast to the rope
indicating a time ahead of or later than the correct time adjective
- My watch is always fast.
quickly or rapidly, which is often used as a combining form adverb
- How fast can they get here?
resistant to destruction or fading adjective
- fast colors