ɪt ʃˌʊd biː dɪstˈɪŋɡwɪʃt fɹʌm pɹˈɪvᵻlɪdʒ sˌɛpɚɹˈeɪʃən, wˌɪtʃ ɪz ɐ mˈʌtʃ mˈoːɹ ɪfˈɛktɪv sᵻkjˈʊɹɹᵻɾi mˈɛʒɚ ðæt sˈɛpɚɹˌeɪts ðə pɹˈɪvᵻlɪdʒd pˈɑːɹts ʌvðə sˈɪstəm fɹʌm ɪts ʌnpɹˈɪvᵻlɪdʒd pˈɑːɹts baɪ pˈʊɾɪŋ ðˌɛm ˌɪntʊ dˈɪfɹənt pɹˈɑːsɛsᵻz, æz əpˈoʊzd tə swˈɪtʃɪŋ bᵻtwˌiːn ðˌɛm wɪðˌɪn ɐ sˈɪŋɡəl pɹˈɑːsɛs.
It should be distinguished from privilege separation, which is a much more effective security measure that separates the privileged parts of the system from its unprivileged parts by putting them into different processes, as opposed to switching between them within a single process.