bigamist
/ˈbaɪɡəmɪst/Definitions
1. noun
A person who has two spouses at the same time, especially one who has entered into a second marriage without having been divorced from the first.
“The scandal surrounding the bigamist led to his public downfall.”
2. noun
A person who practices bigamy, the act of having two spouses at the same time.
“The police investigated the bigamist for marrying multiple times without divorcing his first wife.”