Princeton's WordNet(5.00 / 1 vote)Rate this definition: 1  fauna, zoology(noun) all the animal life in a particular region or period. the fauna of China; the zoology of the Pliocene epoch. 2  zoology, zoological science(noun) the branch of biology that studies animals.
The American Civil War, widely known in the United States as simply the Civil War as well as other sectional names, was a civil war fought from 1861 to 1865 to determine the survival of the Union or independence for the Confederacy.
In the 1860s the northern and southern parts of the United States fought the American Civil War. The war started after 11 Southern states separated themselves from the United States and formed their own government. Their army fought the forces of the U.S. government. The Civil War threatened to break up the United States.