| n. | 1. | The mother of one's father or mother. |
| Noun | 1. | grandmother - the mother of your father or mother |
GRANDMOTHER, domestic relations. 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.
beldam, crone, dame, dowager, frump, gammer, grandam, grandma, grannam, granny, great-grandmother, hag, old battle-ax, old dame, old girl, old granny, old lady, old trot, old wife, old woman, trot, war-horse, witch