Definition of conspiratorialism in English:

conspiratorialism

Pronunciation /kənˌspɪrəˈtɔːrɪəlɪz(ə)m/ /ˌkɒnspɪrəˈtɔːrɪəlɪz(ə)m/

noun

  • 1Participation in conspiracies; conspiratorial activity.

  • 2US Belief in or promotion of conspiracy theories.

Origin

1930s. From conspiratorial + -ism.