grandsire

English

Etymology

grand- +‎ sire

Noun

grandsire (plural grandsires)

1. Grandfather.
   • 1956, C. S. Lewis, The Last Battle, Collins, 1998, Chapter 5,

     “I am going to a certain tower, one of three that were built in my grandsire’s time to guard Lantern Waste against certain perilous outlaws who dwelled there in his day. […] "

2. Any male ancestor.
3. Any of a number of methods of change-ringing on bells.
4. (equestrianism) The sire of a sire, paternal grandfather

Usage notes

In the equestrian sense, maternal grandfather is a damsire (i.e. sire of a dam), not a grandsire.