reflection
noun
1.
a calm, lengthy, intent consideration
2.
the phenomenon of a propagating wave (light or sound) being thrown back from a surface
3.
expression without words
4.
a likeness in which left and right are reversed
5.
the image of something as reflected by a mirror (or other reflective material)
6.
(mathematics) a transformation in which the direction of one axis is reversed
7.
a remark expressing careful consideration
8.
the ability to reflect beams or rays