Pronunciation: (sut'l-īz", sub'tu-līz"), [key]
—v., -ized, -iz•ing.
1. to elevate in character; sublimate.
2. to make (the mind, senses, etc.) keen or discerning; sharpen.
3. to introduce subtleties into or argue subtly about.
4. to make thin, rare, or more fluid or volatile; refine.
to make subtle distinctions or to argue subtly. Also, esp. Brit.,sub'til•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.