In polyamory, it’s not just about your multiple partners. Inevitably, if your partners also have other partners, you’re going to have metamours. “Metamour” or “meta” is the term for your partners’ other partners. Metamour relationships can end up being one of the most challenging parts of polyamory. After all, you didn’t choose your metamours but, even if you never meet, you’re sharing someone who’s important to both of you.