Definition of East
In the absence of other words qualifying its meaning, the word “east” describing boundaries means due east. Livingston Oil & Gas Co. v. Shasta Oil Co., Tex.Civ.App., 114 S.W.2d 378, 381. The general direction of sunrise. Point directly opposite to west. See also Easterly.
That's the definition of East in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.