From Longman Dictionary of Contemporary Englisha marriage of conveniencea marriage of convenienceSSFMARRYa marriage that has been agreed for a particular purpose, not because the two people love each other In the past most royal marriages were marriages of convenience, arranged for political reasons. → convenience
Examples from the Corpus
a marriage of convenience• Gerard Depardieu plays a French immigrant in a marriage of convenience with Andie McDowell.• He told me he was in a marriage of convenience.• Though the diplomatic courtship is at an early stage, the Foreign Office is optimistic about such a marriage of convenience.• After all, it was a marriage of convenience for her.• The Home Office had suspected that it was a marriage of convenience, to get the woman in.• It was a marriage of convenience. 