So a monorail is a railroad that has only one rail, a monotonous voice seems to have only one tone, and a monopoly puts all ownership in the hands of a single company, eliminating any competition. Tell me more about Merriam-Webster's Vocabulary Builder. Geese, swans, and many other birds are monogamous and mate for life. There are cultures with laws that permit marriage to more than one person at a time, or polygamy.
Some Islamic countries permit polygamy, as do some African tribes.
In this country the Mormons were polygamous until 1890, when they were forced to practice monogamy by the unsympathetic federal government. A scholarly essay written on a single small topic and published separately. Her paper on the slang used by southern college students was printed as a monograph. A monograph usually takes the form of a book, but a smallish book. The contents discuss a single area or subject.