Hyannis (hĪănˈĭs) [key], resort village (1990 pop. 14,120), Barnstable co., SE Mass., on Cape Cod; inc. 1639. It is the business center and shipping point of the area; major industries are tourism and home construction. There are large retail malls and light industry. Hyannis provides ferry transportation to Martha's Vineyard and Nantucket island. A conservatory of music and arts is located there. Nearby Hyannisport is famous as the site of a compound of houses owned by the Kennedy family.