Definition of situationism in US English:

situationism

noun

  • The theory that human behavior is determined by surrounding circumstances rather than by personal qualities.

    • ‘No-one actually knows what situationism is because they everyone falls asleep within 2 seconds of starting to read a ‘text’.’

Pronunciation

situationism

/ˌsiCHo͞oˈāSHəˌnizəm/