Originally Posted by Catfish
Polyamory is an evolving term in my opinion.
I don't think it's evolving much, at all. It refers to part of the spectrum of nonmonogamy wherein folks have multiple romantic relationships at the same time with the consent of all involved. The word differentiates that part of the nonmonogamous spectrum from others--eg., swinging, open relationships.
A man cheating on his wife clearly is not polyamorous. He's just bad at monogamy. Should his wife gain full knowledge of his affairs and give consent, then he can speak of poly.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.