ばあばMeanings1noungrandma; grandmotherchildren's languageAffectionate children's word for grandmother, similar to 'granny' or 'nana'. Used by or to young children.See also: おばあさんばあば、遊あそぼう!Grandma, let's play!今日きょうはばあばの家いえに行いくんだ。We're going to grandma's house today.