The surface of the lake on the background of sunsetThe surface of the lake on the background of sunset
A red heart stuck in a crack in the wooden surfaceA red heart stuck in a crack in the wooden surface
Bridges illuminated and the water surface in the nightBridges illuminated and the water surface in the night
Reflection of the sunset on the surface of the waterReflection of the sunset on the surface of the water
Reflection of snowy mountains in the water surfaceReflection of snowy mountains in the water surface
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..