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"tears are an expression of grief"
4. a likeness in which left and right are reversed
5. the image of something as reflected by a mirror (or other reflective material)"he studied his reflection in the mirror"
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