'Polygyny' definitions:

Definition of 'polygyny'

(from WordNet)
noun
Having more than one wife at a time

Definition of 'Polygyny'

From: GCIDE
  • Polygyny \Po*lyg"y*ny\, n. [Poly- + Gr. ? woman, wife.] The state or practice of having several wives at the same time; marriage to several wives. --H. Spenser. [1913 Webster]