What is the lexical meaning of polemical terms?

Polemical terms (democracy, semantics, pragmatics) constitute a special category of polysemous terms. Like all polysemous terms, their use evidences a plurality of conventionalised senses that are felt to be related to one another and, possibly, to a highly abstract core meaning. However, in contrast with ordinary polysemous terms such as rubbish or mouth, polemical terms have something ‘polemical’ about what counts as their primary sense, i.e....