- 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.
- an attack; assault
- a beginning; start
- The beginning or start of something: the onset of a cold.
- Linguistics The part of a syllable that precedes the nucleus. In the word nucleus (n&oomac;′klē-&schwa;s), the onset of the first syllable is (n), the onset of the second syllable is (kl), and the last syllable has no onset.
- Archaic An attack by military forces; an assault.
- A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.
- (medicine) The initial phase of a disease or condition, in which symptoms first become apparent.
- (phonology) The initial portion of a syllable, preceding the syllable nucleus.
- (acoustics) The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
(third-person singular simple present onsets, present participle onsetting, simple past and past participle onset)
- (obsolete) To assault; to set upon.
- (obsolete) To set about; to begin.
From on- +â€Ž set. Compare Old English onsettan (â€œto impose; oppress, bear downâ€).