What does radicalisation mean?
Radicalisation is the process of becoming more extreme in one's beliefs, behaviour, or political commitments. The word is used especially in discussions of politics, religion, activism, and security, where it may describe individuals or groups moving away from moderate, conventional, or gradual positions. It can also refer to the deliberate effort to make people more ideologically extreme. In many contemporary contexts, the term has a negative connotation: it often suggests not merely strong advocacy for change but a rejection of compromise and an increasing willingness to use extreme or confrontational methods. Nevertheless, its basic meaning is neutral and focuses on the process of change. The related verb is radicalise in British English and radicalize in American English. Understanding the word is useful when interpreting reports on extremism, political movements, online radicalisation, and the growing influence of uncompromising political rhetoric.
nounThe process of becoming increasingly extreme in one's beliefs, behaviour, or political commitments, especially when this involves rejecting moderate or gradual approaches. It can also refer to the act of causing someone or something to become more radical.
- The process of becoming more extreme in political views, beliefs, or behaviour.
- The act or process of making someone or something more extreme or radical.
"The radicalisation of the movement transformed a campaign for reform into a broader call for sweeping change."
"Widespread dissatisfaction contributed to the radicalisation of local politics."
"The organisation monitors online networks that may facilitate the radicalisation of young people."
The noun is usually uncountable; the plural form is uncommon and is used when referring to separate instances of the process.
"The report compares radicalisations occurring in different political movements."
A political movement can begin with a demand for change, but radicalisation names the moment when compromise starts to look like surrender.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does radicalisation come from?
Radicalisation was formed in English by combining radical with the suffix -isation, meaning the process or action of making something radical. Radical ultimately comes from Latin radicalis, meaning "of a root" or "going to the root," and is derived from radix, "root." The word's original mathematical and botanical associations developed into its modern political sense through the idea of reaching or proceeding to fundamental roots.
Related word forms
How radicalisation is actually used
The term is especially common in political, security, and social-policy contexts. It often carries a negative or concerned connotation because radicalisation is associated with ideological extremism, although it can describe any shift toward more radical positions.
Easily confused with radicalisation
Radicalisation is the British spelling, while radicalization is the American spelling; they refer to the same process.