In linguistics, Communicative Dynamism (CD) is one of the key notions of the theory of Functional Sentence Perspective (FSP), developed mainly by Jan Firbas and his followers in the Prague School of Linguistics.
CD is canonically described as "a phenomenon constantly displayed by linguistic elements in the act of communication.
The closer to the end of the sentence an element comes to stand, the greater the extent to which it contributes towards the development and completion of the communication.
"[2] The notion of Communicative Dynamism was introduced into linguistics by Jan Firbas in 1956 in a study called Poznámky k problematice anglického slovního pořádku s hlediska aktuálního členění větného [Some notes on the problem of English word order from the point of view of functional sentence perspective].
[3] Today, the term is firmly established in major academic grammars, as well as in general reference works on language and linguistics: