Definition of reflection are 1.the return of light or sound waves from a surface
2 .the production of an image by or as if by a mirror
3.a : the action of bending or folding back
b : a reflected part : fold
4: something produced by reflecting: as
a : an image given back by a reflecting surface
b : an effect produced by an influence
5: an often obscure or indirect criticism : reproach
6: a thought, idea, or opinion formed or a remark made as a result of meditation
7: consideration of some subject matter, idea, or purpose
8.obsolete : turning back : return
9a : a transformation of a figure in which each point is replaced by a point symmetric with respect to a line or plane
b : a transformation that involves reflection in more than one axis of a rectangular coordinate