Onset meaning

ŏnsĕt, ôn-
The onset is the start or beginning of something, especially of something unpleasant.

Sniffles and a sore throat might be described as examples of the onset of a cold.

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(medicine) The initial phase of a disease or condition, in which symptoms first become apparent.
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(phonology) The initial portion of a syllable, preceding the syllable nucleus.
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(obsolete) To assault; to set upon.
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The beginning or start of something.

The onset of a cold.

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The part of a syllable that precedes the nucleus. In the word nucleus (no͝o&STRESS;klē-əs), the onset of the first syllable is (n), the onset of the second syllable is (kl), and the last syllable has no onset.
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An attack by military forces; an assault.
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An attack; assault.
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A beginning; start; appearance.

The onset of symptoms.

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A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.
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(acoustics) The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
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(obsolete) To set about; to begin.
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Origin of onset

  • From on- +"Ž set. Compare Old English onsettan (“to impose; oppress, bear down").

    From Wiktionary