Saying "poly" is just a shortened version, or diminutive, as it were, of the word polyamory. It's a lazy nickname. It doesn't change the meaning to say poly rather than the entire word.
Non-monogamy means any relationship that is not monogamous. That includes cheating, swinging, and polyamory ("poly" for short). There are clear differences between all of them, but non-monogamy is the umbrella term, for sure.
Last edited by nycindie; 08-24-2011 at 01:21 AM.