I. ˈgran(d)ˌ ̷ ̷, -raan- noun
Etymology: Middle English grauntsire, from Old French grant sire, from grant grand + sire
1.
a. or grand·sir -n(t)sə(r) now dialect : grandfather
b. or grandsir Scotland : a great grandfather
c. archaic : ancestor , forefather
d. archaic : an aged man
2. : a dam's or sire's sire — used of an animal
3. : a method of ringing changes on a set of church bells
grandsire maximus
— see change ringing illustration
II. transitive verb
: to be grandsire to
grandsired the modern cult by preaching sanctification — American Mercury