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grandfather

[ gran-fah-ther, grand- ]
/ ˈgrænˌfɑ ðər, ˈgrænd- /
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See synonyms for: grandfather / grandfathering on Thesaurus.com

noun
the father of one's father or mother.
a forefather.
the founder or originator of a family, species, type, etc.; the first of one's or its kind, or the one being longest in existence: the grandfather of all steam locomotives.
verb (used with object)
to exempt (something or someone) from new legislation, restrictions, or requirements: The law grandfathered all banks already operating at the time of passage. He was grandfathered into the pension plan.
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Origin of grandfather

late Middle English word dating back to 1375–1425; see origin at grand-, father
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use grandfather in a sentence

British Dictionary definitions for grandfather

grandfather
/ (ˈɡrænˌfɑːðə, ˈɡrænd-) /

noun
the father of one's father or mother
(often plural) a male ancestor
(often capital) a familiar term of address for an old man
dialect a caterpillar or woodlouse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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