See all translations. uk ​ /ˌmæn.ɪ.fesˈteɪ.ʃən/ us ​ /ˌmæn.ə.fesˈteɪ.ʃən/ formal. › [ C ] a sign of something existing or happening: She claimed that the rise in unemployment was just a further manifestation of the government's incompetence.