The natural semantic metalanguage (NSM) is a linguistic theory based on the conception of Polish professor Andrzej Bogusławski. The theory was formally developed by Anna Wierzbicka at Warsaw University and later at the Australian National University in the early 1970s, and Cliff Goddard at Australia's Griffith University.
The natural semantic metalanguage theory attempts to reduce the semantics of all lexicons down to a restricted set of semantic primitives, or primes. Primes are universal in that they have the same translation in every language, and they are primitive in that they cannot be defined using other words. Primes are ordered together to form explications, which are descriptions of semantic representations consisting solely of primes.
Research in the NSM approach deals extensively with language and cognition, and language and culture. Key areas of research include lexical semantics, grammatical semantics, phraseology and pragmatics, as well as cross-cultural communication.
Languages studied in the NSM-framework include English, Russian, Polish, French, Spanish, Malay, Japanese, Italian, Chinese, Korean, Ewe and East Cree, as well as Swedish.