ˌæplɪkˈeɪʃən vˌɜːtʃuːəlᵻzˈeɪʃən lˈeɪɚz ɹᵻplˈeɪs pˈɑːɹt ʌvðə ɹˈʌntaɪm ɛnvˈaɪɹənmənt nˈoːɹməli pɹəvˈaɪdᵻd baɪ ðɪ ˈɑːpɚɹˌeɪɾɪŋ sˈɪstəm.
Application virtualization layers replace part of the runtime environment normally provided by the operating system.