0 grandson [noun]US /ˈɡræn.sʌn/ UK /ˈɡræn.sʌn/ Oxford Essential Dictionary grandson noun the son of your son or daughter Longman Dictionary of Contemporary English grandson grand‧son /ˈɡrænsʌn/ noun [countable] the son of your son or daughter Oxford Advanced Learner's Dictionary grandson grand·son [grandson grandsons] [ˈɡrænsʌn] [ˈɡrænsʌn] noun a son of your son or daughter compare granddaughter Cambridge Advanced Learner's Dictionary grandson grandson /ˈgrænd.sʌn/ noun [C] the son of a person's son or daughter Collins Advanced Learner’s English Dictionary grandson /grænsʌn/ (grandsons) Someone’s grandson is the son of their son or daughter. My grandson’s birthday was on Tuesday. N-COUNT: oft with poss Merriam-Webster's Advanced Learner's Dictionary grandson grand·son /ˈgrændˌsʌn/ noun, pl -sons [count] : a son of your son or daughter American EnglishBritish EnglishA2 (Elementary)grandsonnounShortened URL: http://lngt.co/grandson1-en