As a noun grandmother
is a mother of someone's parent.
As an adjective grandmaternal is
of or relating to a grandmother.
A mother of someone's parent.
A female ancestor or progenitor.
, mother of someone's parent
) baba (loanword from Eastern Europe
), gammy, gram, gramma, gran, grandma, grandmom, granny, eldmother/eldermother, mimi, nan (British slang
), nanna, nanny, Mamaw
* (with regard to gender) grandfather
* (with regard to ancestry) granddaughter, grandson, grandchild
of or relating to a grandmother