grandmotherPronunciation: /ˈgran(d)mʌðə/Translate grandmother | into French | into German | into Italian | into Spanish Definition of grandmother noun the mother of one’s father or mother: my grandmother is ill [as name]:to dearest Grandmother, with love and gratitude [as title]:Grandmother AshaPhrases teach one's grandmother to suck eggs presume to advise a more experienced person. Derivatives grandmotherly adjective grandmother in other Oxford dictionaries Definition of grandmother in the US English dictionary