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:

    ‘some are seeing this as a victory against the vitriolic online presence of the alt-right’
    ‘he disputed the notion that there is a racial element to the alt-right's brand of nationalism’
    [as modifier] ‘the alt-right blogosphere’

Origin

Early 21st century: from alt- + right.

Pronunciation

alt-right

/ɒltˈrʌɪt/