/ əʊˈeɪsɪs; NAmE oʊ-/ noun ( pl. oases / -siːz; NAmE /)
1.
an area in the desert where there is water and where plants grow
2.
a pleasant place or period of time in the middle of sth unpleasant or difficult
SYN haven :
an oasis of calm
a green oasis in the heart of the city
••
WORD ORIGIN
early 17th cent.: via late Latin from Greek , apparently of Egyptian origin.