stepgrandson noun1 •The grandson of one's stepgrandfather's wife or stepgrandmother's husband from previous marriage, or the stepson of one's child.The son of an out-of-work contractor can hope for a crack someday at a Senate seat, knowing that the stepgrandson of a woman who lives in a metal-roofed shack is moving into the White House. — 2009 formsstepgrandsons
