Grandfather Definition

grăndfäthər, grăn-
grandfathered, grandfathers
noun
grandfathers
The father of one's father or mother.
Webster's New World
A male ancestor; forefather.
Webster's New World

A father of someone’s parent.

Wiktionary
verb
grandfathered

To exempt (an activity, practice, person, etc.) from a new law or regulation by or as by a grandfather clause.

Webster's New World
To include a person or entity in the benefits conferred by a grandfather clause.
Webster's New World Law
other
(father of someone’s father) Paternal grandfather.
Wiktionary
(father of someone’s mother) Maternal grandfather.
Wiktionary

Other Word Forms of Grandfather

Noun

Singular:
grandfather
Plural:
grandfathers

Origin of Grandfather

  • V., from grandfather clause

    From American Heritage Dictionary of the English Language, 5th Edition

  • grand + father

    From Wiktionary

  • From grandfather clause

    From Wiktionary

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grandfather