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

: one that is the first, earliest, or most venerable of its kind

See granddaddy defined for English-language learners

grand·dad·dy also gran·dad·dy

1769

Synonyms: antecedent, archetype, daddy, foregoer, forerunner, ancestor (also grandaddy), precursor, predecessor, prototype

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