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Meaning of backlight

back•light

Pronunciation: (bak'līt"), [key]
— n., v., -light•ed -lit, -light•ing.
—n.
  1. a light source placed behind an actor, object, or scene to create a highlight that separates the subject from the background.
—v.t.
  1. to illuminate (something) from behind.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.