(Isa. 35:7), Heb. sharab, a “mirage”, a phenomenon caused by the refraction of the rays of the sun on the glowing sands of the desert, causing them suddenly to assume the appearance of a beautiful lake. It is called by the modern Arabs by the same Hebrew name serab.
Easton’s Bible Dictionary
Parched ground
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.