strata

Word: strata

Context sentence: The hierarchy referred to is the positioning and interaction at a given historical moment of the different strata of the polysystem.

Sorce: Munday(2001)//Introducing Translation Studies//.London and New York.Routledge

Definition: the plural of stratum a social class in a society eg: people of different social strata

Mnemonic: the form of "strata" is a bit like "status". And the meanings of "social strata" and "social status" are also alike.