Definition of onset in English:


Line breaks: onset
Pronunciation: /ˈɒnsɛt


1The beginning of something, especially something unpleasant: the onset of winter [as modifier, in combination]: early-onset Alzheimer’s disease
More example sentences
  • Already this year, the number of deaths has reached 32 and emergency chiefs fear the onset of poor winter weather may bring more.
  • The onset of winter appears to have been delayed, throwing many plants into confusion.
  • The parents said they then witnessed a regression in their children's behaviour and speech, as well as the onset of an unpleasant bowel disorder.
1.1 archaic A military attack.

Definition of onset in: