There is overlap and there is difference. Let's see if I can put it simply....
If you are more monogamous-inclined and not poly, then if you saw your partner talking to, flirting, or pursuing sex with another person then you would obviously get quite jealous.
If you are very poly-inclined non-jealous person, then that would not be an issue. However if you thought your partner was spending more and more time with his/her other partner and neglecting any good quality time with you, then you would understandably feel envious.
That make sense?
There was a thread where we discussed the differences between envy and jealousy here:
http://www.polyamory.com/forum/showthread.php?p=62929
You might find it interesting.
Yeah, that was the point I was going for. Probably not accurately, though. The "it's not fair" feeling is usually what I would go with for envy for sure....I had that when I was in a triad every now and then. Decent amount of envy here and there for various reasons, but I was never jealous. Which confused some people.So it's a matter of the underlying emotion?
In the mono scenario, the underlying emotion would be anger/insecurity/mistrust. At least IMO.
In the poly, not necessarily any of those emotions, but there would be an imbalance... more "it's not fair."
Am I reading you correctly?
I came across an example of the difference just the other day. My boyfriend and I (both very new to poly) were discussing our surprise at the lack of jealousy we'd been feeling. He said that the closest he'd come was when he and his wife had been visiting one of her OSOs and he'd been left sitting in the spa while everyone else (his wife, her OSO and the OSO's wife) went off to have a threesome. He was in no way jealous of someone having a threesome with his wife, but he was envious of the fact that he didn't get to have a threesome with anyone.