Originating in Northern California, a relight is a cigarette butt found on the ground or in an ashtray. The finder of the relight hopes the person who smoked the cigarette before them doesn't smoke a lot of the cigarette so there is still tobacco left in it for them to use.
"Aye Jack can i bum a cig off u im really craving one"

"Nah Cy, just pick up a relight I saw tons on the street behind us"
by heebie201 November 24, 2018
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N. (re-lie-shun): The branch of physics relating specifically to the reflection and refraction of light.
Today in physics, we learned about relightion.
by The Jugular Juggler March 23, 2017
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