The definition of beringia was the land bridge that existed between Alaska and Siberia that enabled migration of humans and animals to North America.(noun)
An example of Beringia was a 1,000 mile wide piece of land that connected the tip of West Siberia and Alaska.
See Beringia in Webster's New World College Dictionary
Origin: prob. after Vitus Bering + -ia
See Beringia in American Heritage Dictionary 4