By Grace Fleming. A biography is a written account of the series of events that make up a person's life. Every student will write a biography at some point, but the .Noun, plural biographies. 1. a written account of another person's life: the biography of Byron by Marchand. 2. an account in biographical form of an organization .Explore Bio.com, your source for true stories about notable people. Watch full episodes, read exclusive biographies and discover the unexpected ways you're connected .