Pronunciation: (ō-ā'sis), [key]
—pl. -sesPronunciation: (-sēz). [key]
1. a small fertile or green area in a desert region, usually having a spring or well.
2. something serving as a refuge, relief, or pleasant change from what is usual, annoying, difficult, etc.: The library was an oasis of calm in the hectic city.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.