This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The mother of one's father or mother; a grandmother.

n. An old woman.

n. grandmother

n. old lady, elderly woman

n. An old woman; specifically, a grandmother.

n. An old woman; especially, a grandmother.

"Judith Merril was known as the grandam of science fiction and Phyllis as the mother of Canadian SF."

yipping    granduncle    dustball    bat-twirling    abusiveness    grandkids    solicitousness    great-nephew    motherliness    chortle