What is the meaning of the word "synthetic"?

Definitions:

involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis adjective
- limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology P.S.Welch
not genuine or natural adjective
- counterfeit rhetoric that flourishes when passions are synthetic George Will
of a proposition whose truth value is determined by observation or facts adjective
- `all men are arrogant' is a synthetic proposition