On"set` (?), n. [On + set.]
1.
A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.
Milton.
The onset and retire
Of both your armies.
Shak.
Who on that day the word of onset gave.
Wordsworth.
2.
A setting about; a beginning.
[Obs.]
Shak.
There is surely no greater wisdom than well to time the beginnings and onsets of things.
Bacon.
3.
Anything set on, or added, as an ornament or as a useful appendage.
[Obs.]
Johnson.
© Webster 1913.
On"set`, v. t.
1.
To assault; to set upon.
[Obs.]
2.
To set about; to begin.
[Obs.]
Carew.
© Webster 1913.