GRANDAM Meaning of GRANDAM in English [gran.dam] n [ME graundam, fr. AF graund dame, lit., great lady] (13c) 1 or gran.dame a: grandmother b: an old woman 2. or grand.dam : a dam's or sire's dam--used of an animal Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012