poly·​am·​o·​rous | \ ˌpä-​lē-​ˈa-​mə-​rəs How to pronounce polyamorous (audio) , -​ˈam-​rəs\

Definition of polyamorous

: involving, having, or characterized by more than one open romantic relationship at a time : marked by polyamory … Wonder Woman was created by a man who not only believed in the superiority of the fairer sex but also carried on a polyamorous relationship with two feminists who lived with him in one house, along with their children.— Melissa Maerz They are a "polyamorous" family – one whose members are openly committed to several loves at the same time.— Annalee Newitz … many polyamorous relationships are exclusive families whose composition may not change for decades, if ever.— Elizabeth Larsen

First Known Use of polyamorous

1990, in the meaning defined above

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The first known use of polyamorous was in 1990

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