o·a·sis/o`esɪs; əʊˈeɪsɪs/ n [C] plural oases /-siz; -siːz/ 1 a place in a desert where there are trees and water 〔沙漠中的〕绿洲 2 somewhere that is more pleasant and peaceful than the area that surrounds it 宁静宜人的地方: The park was an oasis of calm in the middle of the city. 这公园是市中心的一片宁静之地。