WordReference Random House Unabridged Dictionary of American English © 2026
back•light
(bak′līt′),USA pronunciation n., v., -light•ed or -lit, -light•ing.
n.
v.t.
n.
- Cinema, Show Business[Motion Pictures, Television.]a light source placed behind an actor, object, or scene to create a highlight that separates the subject from the background.
v.t.
- to illuminate (something) from behind.
- back1 + light1 1950–55