- a small fertile or green area in a desert region, usually having a spring or well.
- 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.
- a fertile patch in a desert occurring where the water table approaches or reaches the ground surface
- a place of peace, safety, or happiness in the midst of trouble or difficulty
- a block of light porous material, used as a base for flower arrangements
