Definition of east:
(n) :
one of the four principal
compass points, specifically 90?, conventionally directed to the right on maps; the direction of the rising sun at an equinox
"1895: Thomas Hardy, Jude the Obscure — In a few hours the birds come to it from all points of the compass – east, west, north, and south..."
(adj) :
situated or lying in or towards the east;
eastward;
wind from the east