- Yeah is defined as a way to express yes.
An example of yeah is a teenager agreeing that they will be home for dinner.
Origin of yeahprobably ; from Dutch and amp; German ja, merged with yea
Origin of yeahVariant of yea.
- (informal) Yes.
From a variation of yea, itself from Middle English ya, ye, from Old English Ä¡Ä“a (“yes"), from Proto-Germanic *ja (“yes; thus, so"), from Proto-Indo-European *yÄ“ (“already"). Cognate with Dutch ja, German ja, Danish ja, BokmÃ¥l ja, New Norwegian ja and Swedish ja.