Definition of "great-grandmother" []

• The mother of one's grandparent. (noun)

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• "The castle has provided the inspiration and setting for the television series Downton Abbey and, following the show's popularity, Lady Carnarvon has written Lady Almina and the Real Downton Abbey: The Lost Legacy of Highclere Castle, a book about the history of the castle during the First World War and her husband's great-grandmother, which is out now £10, Hodder."
• "VoVo the Portuguese name my family affectionately called my great-grandmother was bedridden and receiving hospice care in the comfort of my grandparents’ home."
• "Referring to the wheel key in Gramma Marie’s papers—and checking it once, twice, three times—Corey slowly wrote down the first letter of Papa Legba’s word, the word his great-grandmother had uttered in a rage in 1929: M."