Huckleberry FinnFinn, Huck·le·berry /ˈhʌkəlbəri $ -beri/ also called Huck Finn, a character in the books The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn by the 19th century US writer Mark twain. Huckleberry Finn is a very independent young boy who runs away from his father with his friend Jim, who is a black slave who has also run away. → Sawyer, Tom