Dictionary.com

grandfather

[ gran-fah-ther, grand- ]
/ ˈgrænˌfɑ ðər, ˈgrænd- /
Save This Word!
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.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

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. 2022

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
FEEDBACK