Monogamous :: Monogamous (a.) Mating with but one of the opposite sex; -- said of birds and mammals.
Monogamy :: Monogamy (n.) Single marriage; marriage with but one person, husband or wife, at the same time; -- opposed to polygamy. Also, one marriage only during life; -- opposed to deuterogamy..
Monogamy :: Monogamy (n.) State of being paired with a single mate.