Definition of alt-right in English:

alt-right

noun

  • (in the US) an ideological grouping associated with extreme conservative or reactionary viewpoints, characterized by a rejection of mainstream politics and by the use of online media to disseminate deliberately controversial content.

    ‘many in mainstream conservatism see the alt-right as a serious force’
    ‘some are seeing this as a victory against the vitriolic online presence of the alt-right’
    as modifier ‘the alt-right blogosphere’

Origin

Early 21st century: from alt- + right (sense 4 of the noun).

Pronunciation

alt-right

/ɒltˈrʌɪt/