polygynynoun [ U ]
uk/pəˈlɪdʒ.ɪ.ni//pəˈlɪdʒ.ɪ.ni/specialized social science the practice of having more than one wife or permanent female sexual partner at the same time
specialized biology the practice of a male animal having more than one female mate (= sexual partner)
Compare
polyandry
See also
polygamy