no platform - definition and synonyms

verb
  1.   From our crowdsourced Open Dictionary
    to refuse people with extreme views the right to speak at events such as university debates; by extension, to ban anyone whose views are regarded as controversial or unacceptable

    Snowden: officially not cool with no-platforming Germaine Greer.

    She had been at the meeting at a London university that decided to “no platform” me from a debate on whether or not prostitution is harmful to women.

    Submitted from United Kingdom on 26/10/2015