Other forms: grandmothers
Your grandmother is your mother's mother or your father's mother. My grandmother, a great-grandmother, grandmother's house.
English uses one word where many languages distinguish the maternal from the paternal side. The affectionate forms are legion — gran, granny, nan, nana, grandma — and which one a family uses is often the only clue to where they come from. Note teaching your grandmother to suck eggs, meaning explaining something to somebody who knows it far better than you.
1noungrandmotherThe mother of your mother or father.
“His grandmother lived to about ninety-four.”
grandmother is a relative.
Also accepted in games: grandma, granny, nana
Middle English graundmodre is grand- plus mother, on the model of French grand-mère. It replaced the older English eldmother, which meant the same thing.
Middle English
graundmodre
English, today
grandmother
From Middle English graundmodre, grauntmoder, granmoder; equivalent to grand- + mother. Compare French grand-mère. Superseded earlier eldmother, eldermother.
Etymology from Wiktionary, CC BY-SA