Not juvenile; adult.
One who is not a juvenile.
Elegant, sometimes (derogatory) affected, prissy, or bloodless.
Developed, improved.
Subtle, scrupulous, carefully thought out.
Highly-processed and pure.
Free of dross or alloy.
Dealing in a refined product such as sugar or petroleum.
Elevated and polished.
The refined form of a commodity, as opposed to its raw or generic form.