Définitions
1.NounThe initial phase of a disease or condition, in which symptoms first become apparent."the onset of schizophrenia"
2.NounThe initial portion of a syllable, preceding the syllable nucleus.
3.NounThe beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
4.NounA setting about; a beginning."the onset of puberty"
5.NounAnything added, such as an ornament or as a useful appendage.
6.NounAn attack; an assault especially of an army.
7.VerbTo assault; to set upon.
8.VerbTo set about; to begin.