reflection (n.) Look up reflection at Dictionary.com
late 14c., in reference to surfaces, from Late Latin reflexionem (nominative reflexio) "a reflection," literally "a bending back," noun of action from past participle stem of Latin reflectere, from re- "back" (see re-) + flectere "to bend" (see flexible). Meaning "remark made after turning back one's thought on some subject" is from 1650s.