There's two types of reflections, specular and diffuse. Specular is shiny/glossy objects, the light gets reflected out at the same angle it hit the object like \/. Diffuse (matte) the light gets reflected in all directions. In either case a bit of light is absorbed into the material.

If you've ever seen one of those 'infinity mirrors', it eventually stops when the light is totally absorbed by the glass and mirror.