Dictionary
3 ENTRIES FOUND:

granddaddy

noun grand·dad·dy \-ˌda-dē\

: someone or something that is the first or oldest one in a particular area or field

Full Definition of GRANDDADDY

1
:  grandfather 1a
2
:  one that is the first, earliest, or most venerable of its kind

Variants of GRANDDADDY

grand·dad·dy also gran·dad·dy

Examples of GRANDDADDY

  1. <the granddaddy of all English mystery novels>

First Known Use of GRANDDADDY

1769

Rhymes with GRANDDADDY

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