EXPANSE
sweep, expanse
(noun) a wide scope; “the sweep of the plains”
area, expanse, surface area
(noun) the extent of a 2-dimensional surface enclosed within a boundary; “the area of a rectangle”; “it was about 500 square feet in area”
expanse
(noun) a wide and open space or area as of surface or land or sky
Source: WordNet® 3.1
Etymology
Noun
expanse (plural expanses)
A wide stretch, usually of sea, sky, or land.
An amount of spread or stretch.
Source: Wiktionary
Ex*panse", n. Etym: [From L. expansus, p. p. of expandere. See
Expand.]
Definition: That which is expanded or spread out; a wide extent of space or
body; especially, the arch of the sky. "The green expanse." Savage.
Lights . . . high in the expanse of heaven. Milton.
The smooth expanse of crystal lakes. Pope.
Ex*panse", v. t.
Definition: To expand. [Obs.]
That lies expansed unto the eyes of all. Sir. T. Browne.
Source: Webster’s Unabridged Dictionary 1913 Edition