dialect

n. form of a language spoken in a certain area or district; subordinate variety of a language

A dialect (from the Greek word διάλεκτος, dialektos) is a variety of a language characteristic of a particular group of the language's speakers. The term is applied most often to regional speech patterns, but a dialect may also be defined by other factors, such as social class. In popular usage, the word "dialect" is sometimes used to refer to a lesser-known language (most commonly a regional language), especially one that is unwritten or not standardized. This use of the word dialect is often taken as pejorative by the speakers of the languages referred to in that way since it is often accompanied by the erroneous belief that the minority language is lacking in vocabulary, grammar, or importance.
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Noun
1. the usage or vocabulary that is characteristic of a specific group of people; "the immigrants spoke an odd dialect of English"; "he has a strong German accent"
(synonym) idiom, accent
(hypernym) non-standard speech
(hyponym) eye dialect
(class) euphonious

n. dialect, form of a language spoken in a certain area or district; subordinate variety of a language

(n.)
The form of speech of a limited region or people, as distinguished from ether forms nearly related to it; a variety or subdivision of a language; speech characterized by local peculiarities or specific circumstances; as, the Ionic and Attic were dialects of Greece; the Yorkshire dialect; the dialect of the learned.
  

(n.)
Means or mode of expressing thoughts; language; tongue; form of speech.