multiplatform Syllabification: (mul·ti·plat·form)Pronunciation: /ˌməltiˈplatfôrm, ˌməltī-/Definition of multiplatform adjective compatible with or involving more than one type of computer or operating system:a multiplatform software package an all-new multiplatform video gamemultiplatform in other Oxford dictionaries Definition of multiplatform in the British & World English dictionary