Croatan noun3 •A member of a small Native American group once living in the coastal areas of what is now North Carolina. •Ellipsis of Croatan Sound. A sound in Dare County, North Carolina, USA. •(old-fashioned) Ellipsis of Croatan Island. Former name of Hatteras Island. Synonym of Hatteras. An island of Dare County, North Carolina, USA. formsCroatans