1. I
  1. 1〔力学で,反作用〕a reaction
  1. 2〔銃などのはね返り〕
    • この銃は反動が強い
    • This rifle has a powerful kick [recoil].
  1. II〔逆の動き〕(a) reaction

    反動的 reactionary

    • 緊縮政策の反動として3年後には消費が大幅に増えた
    • Three years later the level of consumption rose sharply as a reaction against the austerity measures.
    • 革命に対する反動
    • a counterrevolution
    • 彼らは保守反動だ
    • They are right-wing reactionaries.
  1. 反動思想a reactionary idea
  1. 反動主義者a reactionary
  1. 反動政府a reactionary government
  1. 反動勢力[分子]reactionary forces [elements]