polysemy
This term describes the linguistic property where a single word carries several distinct but conceptually linked senses. It differs from homonymy, where words sound the same but have entirely unrelated origins and meanings. For instance, the word bank can refer to a financial institution or the side of a river; the latter is a case of homonymy, whereas the various meanings of the word run (to move fast, to manage a business, to flow) illustrate polysemy because they share a core idea of continuous movement.
In academic and technical discourse, polysemy is treated as an uncountable mass noun. It refers to the abstract concept or the state of having multiple meanings rather than a countable instance of a word. Consequently, it does not take a plural form in standard linguistic analysis, and one would refer to an instance of this phenomenon as a case of polysemy rather than a polysemy.