1.NounThe condition of having more than one spouse or marriage partner at one time.
"Are there countries where polygamy is legal for both men and women?"
2.NounSynonym of polygyny (“marriage of a man to more than one wife, the practice of having several wives at the same time”).
"Though Islam allows polygamy, it is frowned upon in many contemporary Muslim societies."
3.NounThe state or habit of having more than one sexual mate.
"An insect queen actually practices polygamy only one day, while for an alpha-male defending his harem is the very essence of both his status and polygamy."
4.NounThe condition or state of a plant which bears both perfect and unisexual flowers.