This website has this definition for polyamory:
Polyamory n 1: the state or practice of having more than one open romantic relationship at a time (2008). In Merriam-Webster Online Dictionary. 2: romantically loving more than one person at a time 3: responsible non-monogamy based on honest open communication and conscious choices
This is what Wikipedia says:
Polyamory (from Greek πολύ [poly, meaning many or several] and Latin amor [love]) is the practice, desire, or acceptance of having more than one intimate relationship at a time with the knowledge and consent of everyone involved.
There is nothing in what I said that is not consistent with these definitions. Sorry if I don't fit yours!