The glare of the sun on the smooth surface of the waterThe glare of the sun on the smooth surface of the water
Landscape of the long bridge at sunset over the water surfaceLandscape of the long bridge at sunset over the water surface
A soccer ball lying on the green surface of a huge stadiumA soccer ball lying on the green surface of a huge stadium
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..