Definition of oasis

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o·a·sis    (-ss) KEY 

NOUN:
pl. o·a·ses  (-sz) KEY 

1. A fertile or green spot in a desert or wasteland, made so by the presence of water.
2. A situation or place preserved from surrounding unpleasantness; a refuge: an oasis of serenity amid chaos.

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ETYMOLOGY:
From Late Latin Oasis an oasis in the Libyan desert, from Greek, from Coptic ouahe, from Egyptian w't