What does "dialect" mean?

Dialect: 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. In the midst of this Babel of dialects there suddenly appeared a standard English language. Earle. [Charles V.] could address his subjects from every quarter in their native dialect. Prescott. See Language, and Idiom.