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1.
Adjective; Describes the letter a female member of the military who is deployed to a war writes to her husband/ boyfriend at home to inform him that the relationship is over; connotation: she met someone else while she is fighting a war. Usually, Dear Francis letters admit some sort of infidelity with another serviceman.

Derives its name from the opening of the original letter.

Antonym: Dear John
I got a Dear Francis letter the other day from Afghanistan, and we're getting a divorce.
by Cagen November 04, 2010