reflection

a calm, lengthy, intent consideration

the phenomenon of a propagating wave (light or sound) being thrown back from a surface

expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"

a likeness in which left and right are reversed

the image of something as reflected by a mirror (or other reflective material); "he studied his reflection in the mirror"

(mathematics) a transformation in which the direction of one axis is reversed

a remark expressing careful consideration

the ability to reflect beams or rays