Supradialect (from Latin prefix supra- / "above" and Ancient Greek word διάλεκτος / "conversation") is a linguistic term designating a dialectological category between the levels of language and dialect. It is used in two distinctive contexts, describing structural or functional relations within a particular language. As a structural category, supradialects designate the first level of dialectological subdivision within a language, as for example in the pluricentric Serbo-Croatian language, which is divided into three basic supradialects (Shtokavian, Kajkavian and Chakavian), with each of them being further divided into several dialects. As a functional category, supradialect designates a predominant dialectal form within a particular language, referring to the most commonly used variant of that language, accepted in practice by the majority of its speakers as a basic tool of mutual interaction and communication. In that context, such supradialect also functions as an interdialect.
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- Yan Hong-Ming, "On the Supradialectal Function of the Chinese Characters", Journal of Lingnan Normal University, 4 (2002).