What is the meaning of reflection?

noun

• A calm, lengthy, intent consideration.
  • synonyms: contemplation, reflexion, rumination, musing, thoughtfulness
• The phenomenon of a propagating wave (light or sound) being thrown back from a surface.
  • synonyms: reflexion
• Expression without words.
  • usage: "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"
  • synonyms: expression, manifestation, reflexion
• A likeness in which left and right are reversed.
  • synonyms: mirror image, reflexion
• The image of something as reflected by a mirror (or other reflective material. )
  • usage: "he studied his reflection in the mirror"
  • synonyms: reflexion
• Mathematics) a transformation in which the direction of one axis is reversed. (
• A remark expressing careful consideration.
  • synonyms: observation, reflexion
• The ability to reflect beams or rays.
  • synonyms: reflexion, reflectivity