Wiktionary
n. (context linguistics English) A situation wherein a creole language consists of a spectrum of varieties between those most and least similar to the superstrate language
Wikipedia
The post-creole continuum or simply creole continuum refers to a situation wherein a creole language consists of a spectrum of varieties between those most and least similar to the superstrate language (that is, a closely related language whose speakers assert dominance of some sort). Due to social, political, and economic factors, a creole language can decreolize towards one of the languages from which it is descended, aligning its morphology, phonology, and syntax to the local standard of the dominant language but to different degrees depending on a speaker's status.