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Synonyms

granddaddy

American  
[gran-dad-ee] / ˈgrænˌdæd i /

noun

Informal.

plural

granddaddies
  1. grandfather.


Etymology

Origin of granddaddy

First recorded in 1760–70; grand- + daddy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There are loads of conspiracy theories out there, the granddaddy of them all being the conjecture surrounding John F. Kennedy’s assassination.

From Los Angeles Times • Jul. 20, 2025

“By creating a carousel with his famed figures, he in a sense gets to be Disney. Who doesn’t have great memories associated with state fairs, carnivals and the granddaddy of those, Disneyland?”

From Los Angeles Times • Dec. 1, 2023

If you get lost in the luminous orange peepers of housecats or the baby blues of white tigers, thank the granddaddy of all felines—an ocelotlike creature that lived more than 30 million years ago.

From Science Magazine • Nov. 13, 2023

In an era facing both a reborn nuclear threat and global climate catastrophe, the granddaddy of movie monsters still has a lot to tell humanity.

From Scientific American • Nov. 3, 2023

Running more than 2,100 miles along America’s eastern seaboard, through the serene and beckoning Appalachian Mountains, the AT is the granddaddy of long hikes.

From "A Walk in the Woods" by Bill Bryson