Definition of reactionist in US English:

reactionist

noun & adjective

  • See reaction

    • ‘In every war it was the opportune time for the reactionist and commercial vulture to do his dirty work in the name of patriotism.’
    • ‘They are using their reactionist tactics to try and scare people away from real issues.’

Pronunciation

reactionist

/riˈækʃ(ə)nəst//rēˈakSH(ə)nəst/