1. A wide and open space or area as of surface or land or sky
   "The vast expanse of the Sahara Desert stretched before them"; "They gazed at the starry expanse of the night sky"
    
2. A wide scope
   "the expanse of the plains";
   - sweep
    
3. The extent of a 2-dimensional surface enclosed within a boundary
   "the expanse of a rectangle";
   - area, surface area

Derived forms: expanses

Type of: ambit, compass, extent, orbit, range, reach, scope, space

Encyclopedia: Expanse, Saskatchewan