monogamy

mo·nog·a·my

noun \-mē\

plural mo·nog·a·mies

Definition of MONOGAMY

: the state or custom of being married to one person at a time or of having only one mate at a time

—mo·nog·a·mous \mə-ˈnäg-ə-məs\ also mono·gam·ic \ˌmän-ə-ˈgam-ik\ adjective