1. a particular form of a language which is peculiar to a specific region or social group: "this novel is written in the dialect of Trinidad"
▪ a particular version of a programming language.
Word Originmid 16th century (denoting the art of investigating the truth of opinions): from French dialecte, or via Latin from Greek dialektos ‘discourse, way of speaking’, from dialegesthai ‘converse with’ (see dialogue).