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1.
An Internet dating term. When a person you are meeting for the first time is wearing the same outfit pictured in their Internet dating profile.
On the date Mike realized a double exposure had occurred when Jennifer wore the same blue sweater pictured in her Match.com profile page.
by MarkSol May 13, 2006
 
2.
In photography, when to make one picture, you choose to expose the same frame of film twice.
The appearance of movement in the picture was caused by a double exposure of the boy running.
by d136o May 26, 2006