In regard to cosmology and propositional logic the meanings of contingent and necessity may be accounted for with simplicity. Non-contingent being is used to refer to God. His being is in no way conditional or dependent on anything at all. All other being is conditional.
Necessity means that A...Z need exist for X to exist. In other words or letters; if no A...Z then not X. Transcendence means to surpass the ordinary, to look far beyond the cubicle, to boldly go where no one has gone before... traveling or being beyond laws of the Universe (eg God or space-time faster than light beings made of tachyons). One may construct other definitions obviously.