Definition of no-platform in US English:

no-platform

verb

[with object]British
  • Prevent (a person holding views regarded as unacceptable or offensive) from contributing to a public debate or meeting, especially one at which they had originally been invited to speak.

    ‘dozens of other speakers have been no-platformed because they hold non-leftist opinions’
    ‘if we want to debate the limits of free speech within the law we can't really do that consistently by no-platforming extremists’
    • ‘In no sense did anyone else "no-platform" her.’
    • ‘He has been systematically "no-platformed" ever since he got elected.’
    • ‘The movement calls for extremist speakers to be contested rather than 'no-platformed'.’
    • ‘Do you think he should be no-platformed because he has said some rather dubious things about sexual relationships with minors?’
    • ‘It is difficult to reconcile their opposition to gagging, say, someone who believes adulterers should be killed, with their own representatives' willingness to no-platform allegedly otherwise discriminatory speakers.’
    • ‘She is routinely attacked and no-platformed.’
    • ‘I never said I was no-platformed and I defended her right to not share a platform with me.’
    • ‘These groups attempted to no-platform him and would have succeeded in their efforts if not for an impassioned response from local women's groups.’
    • ‘It's no coincidence that those who speak out are no-platformed, attacked, vilified, slandered, and have their employment threatened.’
    • ‘Using "safe space" as an excuse to silence and no-platform feminists doesn't fly.’
    • ‘The college's student magazine wants to no-platform a woman they don't approve of.’
    silence, muzzle, mute, muffle, stifle, smother, strangle, subdue, suppress, repress
    View synonyms

noun

  • usually as modifier A policy or stance whereby individuals holding views regarded as unacceptable or offensive are prevented from contributing to public debates or meetings.

    ‘there has been an increasingly fierce debate around no-platform policies on university campuses’
    • ‘He argues that it is true to say that some groups have harmed the image of No Platform by using it to stifle debate, but this is rare, and in no way changes the continuing need for No Platform policy under its original intention.’
    • ‘I'm not a supporter of no-platform generally.’
    • ‘By backing the policy, he committed the party to supporting a 'no-platform' policy.’
    • ‘This involves establishing a firm no-platform policy fortheir stooges.’
    • ‘A protest would be held, with demonstrators calling on the national students' organisation to revise its no-platform policies.’
    • ‘The student union explained that no platform policies safeguard union members from being subjected to the bigotry of racists and fascists.’
    • ‘She gamely explains her own "no-platform" boundaries.’
    • ‘He said a "no platform" policy in campuses was damaging Britain's heritage of open debate.’

Origin

1980s: from the No Platform policy of the UK National Union of Students (NUS), forbidding individuals identified as holding racist or fascist views from standing for election to NUS positions or speaking at NUS events.