Rare the sum total of an individual's characteristics of speech; idiolect
popularly any form of speech considered as deviating from a real or imaginary standard speech
Linguis.
a form or variety of a spoken language, including the standard form, peculiar to a region, community, social group, occupational group, etc.: in this sense, dialects are regarded as being, to some degree, mutually intelligible while languages are not mutually intelligible
any language as a member of a group or family of languages: English is a West Germanic dialect