This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A fertile or green spot in a desert or wasteland, made so by the presence of water.

n. A situation or place preserved from surrounding unpleasantness; a refuge: an oasis of serenity amid chaos.

n. A spring of fresh water, surrounded by a fertile region of vegetation, in a desert.

n. A quiet, peaceful place or situation separated from surrounding noise or bustle.

n. A fertile or green spot in a waste or desert, esp. in a sandy desert, where the water table approaches the surface.

n. Any refuge from a prevailing stressful, unpleasant, or annoying situation.

n. Originally, a fertile spot in the Libyan desert where there is a spring or well and more or loss vegetation; now, any fertile tract in the midst of a waste: often used figuratively.

n. a shelter serving as a place of safety or sanctuary

n. a fertile tract in a desert (where the water table approaches the surface)

"“This is what you call an oasis,” said Tam Lin, throwing down his pack and taking out food for the picnic."

shelter    parcel    tract    parcel of land    piece of ground    piece of land   

oases   

haven    refuge    island   

basis   

haven    nook    Lowlands    isle    vale    paradise    fountain    grove    meadow    steppe