Grandfather

имя существительное 1) дедушка Синоним(ы): grandad, grandpa 2) предок Синоним(ы): forefather, ancestor 3) [устаревшее]; смотри значение grandfather clock

Большой англо-русский словарь

Grandfather

I. noun 1. a. the father of one's father or mother b. ancestor 1a 2. granddaddy 2 • grandfatherly adjective II. transitive verb to permit to continue under a grandfather clause

Merriam-Webster's Collegiate Dictionary