1 definition by John Ullman

The practice, state or ability of having more than
one sexual loving relationship at the same time, with the full
knowledge and consent of all partners involved.

This is the definition used by California polyamorist Morning Glory Zell, who coined the term in the early 1980's.
Polyamory differs from adultery because all the partners know about each others' lovers, so there is not secrecy or betrayal.
by John Ullman May 17, 2004
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