(This is as opposed to monologic which refers to one entity with all the information simply giving it to others without exploration and clarification of meaning through discussion.)
A German cannot use the word "fatherland" or the phrase "blood and soil" without (possibly unintentionally) also echoing (or, Bakhtin would say "refracting") the meaning that those terms took on under Nazism.
Bakhtin also emphasized certain uses of language that maximized the dialogic nature of words, and other uses that attempted to limit or restrict their polyvocality.
At one extreme is novelistic discourse, particularly that of a Dostoevsky (or Mark Twain) in which various registers and languages are allowed to interact with and respond to each other.
At the other extreme would be the military order (or "1984" newspeak) which attempts to minimize all orientations of the work toward the past or the future, and which prompts no response but obedience.
Sociologist Richard Sennett has stated that the distinction between dialogic and dialectic is fundamental to understanding human communication.