Definition of "paternal grandfather" []

• The father of one's father (noun)

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• "His paternal grandfather had made cannon for the Continental army and had been one of Thomas Sumter's colonels."
• "As if lecturing from that text, he ejected the facts, helter-skelter, in a voice devoid of emotion: The Cadmuses were “rolling in money”; his paternal grandfather had built an empire in construction and California real estate."
• "The paternal grandfather of the poet decided that his three sons, Robert, William Shergold, and Reuben, should go into business, the two younger in London, the elder abroad."