• Bengali Word দাদা English definition (noun) 1 grandfather. 2 elder brother/cousin brother. 3 (in address) older/senior man. 4 (in affectionate address) younger brother/cousin; grandson; younger/junior man. দাদা বাবু (noun) 1 husband of an elder sister/cousin. 2 employer/master as respectable as one’s elder brother. দাদা মহাশয় (noun) 1 maternal grandfather. 2 (in respectful address) eldest brother.