ONSET


Meaning of ONSET in English

/ ˈɒnset; NAmE ˈɑːn-; ˈɔːn-/ noun

[ sing. ] the beginning of sth, especially sth unpleasant :

the onset of disease / old age / winter

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.