Meaning

noun a calm, lengthy, intent consideration

noun the phenomenon of a propagating wave (light or sound) being thrown back from a surface

noun expression without words

originFrom Middle English refleccion, refleccioun, refleccioune, reflection, from Middle French reflection, reflexion, and its source Late Latin reflexiō, from the participle stem of reflectō. The current spelling is influenced by reflect. Equivalent to reflect + -ion.

Etymology from Wiktionary, CC BY-SA 3.0