1. to cause someone to adopt radical political, social, or religious views
Usage: British spelling; American spelling is ‘radicalize’

Examples

• The professor worried that extremist websites might radicalise vulnerable students.
• Economic hardship can radicalise entire communities.
• The government launched programs to prevent young people from being radicalised.
• Social media platforms are working to identify content that could radicalise users.
• His experiences in prison seemed to radicalise his political beliefs.
• The documentary explored how ordinary citizens became radicalised during the conflict.