simultaneously◼◼◼(occurring at the same time) adverb [UK: ˌsɪml.ˈteɪ.nɪə.sli] [US: ˌsaɪ.məl.ˈteɪ.niə.sli]Everything happened simultaneously. = Tout s'est déroulé simultanément.
simultanémentpreposition
at the same time◼◼◼(simultaneously, see also: at once; simultaneously) preposition [UK: ət ðə seɪm ˈtaɪm] [US: ət ðə ˈseɪm ˈtaɪm]