Grandmother
Defined in 3 dictionaries — Bouvier (1914), Black's (1910), Black's (1891)
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
The mother of one’s father or mother. The father’s mother is called the paternal grandmother; the mother’s mother is the maternal grandmother.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
The mother of either of one's parents.
A Dictionary of Law
Henry Campbell Black · 1891
The mother of either of one’s parents.