I. noun Date: 15th century 1. the father of one's father or mother, ancestor 1a, granddaddy 2, ~ly adjective II. transitive verb Date: 1953 to permit to continue under a ~ clause
GRANDFATHER
Meaning of GRANDFATHER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012