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Meaning of retroreflective

ret•ro•re•flec•tive

Pronunciation: (re"trō-ri-flek'tiv), [key]
— adj.
  1. of or pertaining to a surface, material, or devicethat reflects light or other radiation back to its source; reflective.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.