Definition of "Reflection" :
noun: the image of something as reflected by a mirror (or other reflective material)
"He studied his reflection in the mirror."
noun: a likeness in which left and right are reversed
noun: the ability to reflect beams or rays
noun: a calm, lengthy, intent consideration
noun: a remark expressing careful consideration
noun: expression without words
"The pulse is a reflection of the heart's condition."
noun: the phenomenon of a propagating wave (light or sound) being thrown back from a surface
noun: (mathematics) a transformation in which the direction of one axis is reversed