Noun
(geometry) The total area on the surface of an object.
(computing) The total resources of a system that are accessible from the outside world and thus might be attacked.
Disabling network access to unused ports reduces surface area.
I have to exfoliate my lips as they're quite a large surface area and sometimes when I wear lipstick, it goes all cakey. So I mix brown sugar with lip balm and just scrub it onto them. Georgia May Jagger
I definitely rediscovered reading for pleasure by devoting such a large swath of my time to sitting on airplanes. I am now painfully adept at removing my shoes so as to have the least amount of foot surface area touching an airport floor. Sloane Crosley