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Definition of refract:

  1. To bend sharply and abruptly back; to break off.
  2. To break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium.

Synonyms:

straight, angle, turn.

Usage examples: