Sentence:  Bordewijk and van Kaam describe the one-to-many architecture of modern broadcast mass media as ‘<WSD>allocution</WSD>'. This is the least responsive type of interactivity because it is not designed to support exchanges. . . . The one-way flow of information is under the programmatic control of the media service provider. 
Meaning of the word marked with <WSD> tags:  The mode of information dissemination in which media broadcasts are transmitted to multiple receivers with no or very limited capability of a two-way exchange of information.