monogamist

plural monogamists

1. A person who practices monogamy.

   I maintained with Whiston, that it was unlawful for a priest of the church of England, after the death of his first wife, to take a second, or to express it in one word, I valued myself upon being a strict monogamist.

   1766, Oliver Goldsmith, chapter 2, in The Vicar of Wakefield

   1 more example

   Suppose, for example, that if polygamy were legal, 10 percent of adult men would take an average of three wives apiece and that all remaining marriages would be monogamous. Among aspiring monogamists, there would then be nine men for every seven women.

   2006 March 16, Robert H. Frank, “Polygamy and the Marriage Market: Who Would Have the Upper Hand?”, in The New York Times