Definitions for "Expanse"
Keywords:  sky, extent, expand, rectangle, arch
That which is expanded or spread out; a wide extent of space or body; especially, the arch of the sky.
To expand.
the extent of a 2-dimensional surface enclosed within a boundary; "the area of a rectangle"; "it was about 500 square feet in area"
Keywords:  sweep, scope, plains, wide
a wide scope; "the sweep of the plains"