What is the definition to surface area?

Noun 1. surface area - 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, area

extent - the distance or area or volume over which something extends; "the vast extent of the desert"; "an orchard of considerable extent"

acreage, land area - an area of ground used for some particular purpose (such as building or farming); "he wanted some acreage to build on"

footprint - the area taken up by some object; "the computer had a desktop footprint of 10 by 16 inches"

erasure - a surface area where something has been erased; "another Word had been written over the erasure"

blank space, space, place - a blank area; "write your name in the space provided"

space - one of the areas between or below or above the lines of a musical staff; "the spaces are the notes F-A-C-E"

balk, baulk - the area on a billiard table behind the balkline; "a player with ball in hand must play from the balk"

plane section, section - (geometry) the area created by a plane cutting through a solid