Meaning of REFLECTION in English

■ noun

1》 the fact or phenomenon of light, heat, sound, etc. being reflected.

↘something reflected or an image so formed.

2》 a thing bringing discredit.

3》 serious thought or consideration.

↘a considered idea, expressed in writing or speech.

4》 Mathematics the symmetry operation of inverting something with respect to a plane.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.