to send or throw (light, sound, etc) back or at an angle
to show (something) as an image or likeness
to make (something) manifest or apparent
The pulse reflects the condition of the heart
to throw back light or sound
to think quietly and calmly
(+ on/upon) to tend to bring reproach or discredit
The investigation reflects on all the members of the department
(+ on) to tend to bring about a specified appearance or impression
This is not an act which reflects favourably on her
[Middle English reflecten from Latin reflectere to bend back, from re- + flectere to bend]