1. a grandfather; a male ancestor
Usage: archaic or literary
2. an old man; a venerable male figure
Usage: archaic or literary

Examples

• My grandsire fought in the Civil War.
• The grandsire of the family sat by the fire, telling stories of old times.
• He spoke with the wisdom of a grandsire.
• The village grandsire was respected by all the younger generations.
• In the old tale, the grandsire passed down his knowledge to his heirs.