Definition of onset

Definition of onset
  1. onset Noun A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.
  2. onset Noun The initial phase of a disease or condition, in which symptoms first become apparent.
  3. onset Noun The initial portion of a syllable, preceding the syllable nucleus.
  4. onset Noun The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
  5. onset Noun A setting about; a beginning.
  6. onset Noun Anything set on, or added, as an ornament or as a useful appendage.
  7. onset Verb To assault; to set upon.
  8. onset Verb To set about; to begin.
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