The meaning of REFLECTION is an instance of reflecting; especially : the return of light or sound waves from a surface. How to use reflection in a sentence.

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the …

REFLECTION definition: 1. the image of something in a mirror or on any reflective surface: 2. the return of light, heat…. Learn more.

Definition of reflection noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Apr 22, 2026 · reflection, abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums. At least part of the oncoming wave disturbance remains in the …

Reflected waves return immediately to their original medium instead of entering the medium they encounter. ♦ According to the law of reflection, the angle of reflection of a reflected wave is equal to …

There are 22 meanings listed in OED's entry for the noun reflection, five of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

REFLECTION definition: the act of reflecting, as in casting back a light or heat, mirroring, or giving back or showing an image; the state of being reflected in this way. See examples of reflection used in a …

the act of reflecting or the state of being reflected:[uncountable] the reflection of the sun on the water. [countable] something reflected, as an image. careful consideration:[uncountable] After much …

Apr 21, 2026 · reflection (countable and uncountable, plural reflections) The act of reflecting or the state of being reflected. The property of a propagated wave being thrown back from a surface (such as a …