Monogamist

noun

Definitions

Noun
  1. 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."

  2. 2
    someone who practices monogamy (one spouse at a time) wordnet

Etymology

From monogamy + -ist.

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