Definition of "great-" in English

prefix

1. With familial designations, used to denote a removal of one generation

   • great-uncle (an uncle of one's mother or father)
   • great-grandfather (the father of one's grandfather)
   • great-great-grandfather (a grandfather of one's grandfather)
   • great-great-great-grandfather, etc.
   • (informal) fourth-great-granduncle, etc. (same as great-great-great-great-granduncle)
   • (informal) fourth-great-grandfather, etc. (same as great-great-great-great-grandfather)