There`up*on" (?), adv.
1.
Upon that or this; thereon.
"They shall feed
thereupon."
Zeph. ii. 7.
2.
On account, or in consequence, of that; therefore.
[He] hopes to find you forward, . . .
And thereupon he sends you this good news.
Shak.
3.
Immediately; at once; without delay.
© Webster 1913.