backlighting

noun

1. a controlled technique of lighting, used in photography or the theater, in which a light is placed behind or at right angles to an object, person, or scene to produce such effects as depth or separation of subject and background.

noun

1. Movies, Television. a light source placed behind an actor, object, or scene to create a highlight that separates the subject from the background.

verb (used with object), back·light·ed or back·lit, back·light·ing.

2. to illuminate (something) from behind.