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Definition of grandfather noun from the Oxford Advanced Learner's Dictionary

grandfather

noun

/ˈɡrænfɑːðə(r)/

/ˈɡrænfɑːðər/

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the father of your father or mother
- The firm had been founded by his grandfather.
see also grandad, grandaddy, grandpa compare grandmotherTopics Family and relationshipsa1

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