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The act of promising to propose before actually proposing for marriage.
Can be used as a noun as well.
I'm going to prompose to Alexandra to let her know it will happen... eventually.

The promposal will be on Friday!
by LoveStruckCanadian February 06, 2013
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To ask someone to prom, a formal dance held by most high schools in the United States and elsewhere.
I'm going to prompose to Jessica today, wish me luck!
via giphy
by quenix June 01, 2018
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