TerraForm Power, Inc. operates clean power generation assets such as solar, wind, natural gas, geothermal and hydro-electricity. The Company also operates hybrid power generation assets.
Definition of a Sphere A sphere is a geometrical figure that is perfectly round, 3-dimensional and circular - like a ball. Geometrically, a sphere is defined as the set of all points equidistant from a single point in space.
Wiktionary(2.50 / 2 votes)Rate this definition: 1  surface(Noun) The up-side of a flat object such as a table, or of a liquid. 2  surface(Noun) The outside hull of a tangible object. 3  surface(Noun) The locus of an equation (especially one with exactly two degrees of freedom) in a more-than-two-dimensional space.