grandfather
//ˈɡræn(d)ˌfɑːðər//
Noun
grandfatherSingular
grandfathersPlural
1
The father of one's mother or father; a male ancestor in the second generation.
My grandfather tells me stories about his childhood.
2
A male ancestor more remote than a parent; a forefather.
My grandfather fought in the war many generations ago.
Verb
1
To exempt (someone or something) from a new law or regulation by including a grandfather clause.
Existing businesses were grandfathered under the new zoning law.