mamaw in English dictionary mamaw Meanings and definitions of "mamaw" noun (US, dialect, Southern US) One's grandmother, especially one's maternal grandmother. noun (US, dialect, Southern US, less commonly) One's mother. more Grammar and declension of mamaw mamaw (plural mamaws) more Mamaw Meanings and definitions of "mamaw" (Southern US) Used in addressing or referring to one's grandmother, especially the maternal grandmother. (Southern US, less commonly) Used in addressing or referring to one's mother. more Sample sentences with "mamaw" Declension Stem Try again Authors