a person who practices or favors polygamy.
Origin of polygamist
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for polygamistic
Historical Examples of polygamistic
He upheld all the members of the polygamistic and governing class by his favoritism toward them.Defense of the Faith and the Saints (Volume 1 of 2)
B. H. Roberts