1A member of one of the nationalist fasci in Italy in the period immediately after the First World War (1914–18); (subsequently) a member or supporter of the National Fascist Party which emerged from these groups during 1921. Usually in plural and with capital initial, in form Fascisti. See also fascio and "fascism", and compare "fascist". Now historical.

2Generally. A member or supporter of a similar group or organization in another country. Compare "fascist". Now chiefly historical.

3In extended use. With modifying word: a person who is intolerant or authoritarian with regard to the specified aspect of life or sphere of activity.

Of or relating to the nationalist fasci in Italy in the period immediately after the First World War (1914–18); (subsequently) of or relating to the National Fascist Party which emerged from these groups, or its principles or ideology. See "fascist". Now historical.