1a fertile spot in a desert, where water is found:a country of oases and burning desert sands
a pleasant or peaceful area or period in the midst of a difficult or hectic place or situation:the park is an oasis of calm in the centre of the city
2 (Oasis) [mass noun] trademark a type of rigid foam into which the stems of flowers can be secured in flower arranging:cover the ball of Oasis with leaves and moss
