polyamorous

From a 1990 article by Morning Glory Zell-Ravenheart, "A Bouquet of Lovers", from poly- +‎ amorous or polyamory +‎ -ous.

polyamorous (not comparable)

1. Having relationships with multiple partners, with the knowledge and consent of all involved; engaging in polyamory.
   • 2016 April 3, Zachary Zane, “Where Do "Messy Bisexuals" Fit Into the Bi+ Community?”, in HuffPost‎^[1], archived from the original on 7 June 2022:

     Being polyamorous isn't inherently wrong. Neither is desiring threesomes or kinky sex.

2. Open to having such relationships, regardless of one's experience or current practices.

• poly (informal)
• polyam (informal)

• monoamorous
• ambiamorous
• monogamous
• polyfidelitous
• polysexual

• Wikipedia article on Polyamory
• The alt.polyamory home page