Meaning of “oasis” - Learner’s Dictionary

oasis

noun [ C ] uk us /əʊˈeɪsɪs/ (plural oases /əʊˈeɪsiːz/)
DESERT

a place in the desert where there is water and where plants grow

CALM

a place that is much calmer and more pleasant than what is around it:

The cafe was an oasis in the busy, noisy city.

(Definition of “oasis” from the Cambridge Learner’s Dictionary © Cambridge University Press)