(ˈ) ̷ ̷| ̷ ̷ adverb
Etymology: Middle English wheron, from where, wher where + on
1. archaic : on what
whereon do you look — Shakespeare
2.
a. : on which
conducted ranches whereon to grow supplies for sale — P.A.Rollins
that day … whereon he says I shall yield up my crown — Shakespeare
b. : to, toward, or upon which
the things whereon he cast his eyes — R.W.Emerson
c. : in the course of which : in connection with which
installed a service between New York and San Francisco, whereon the planes flew only by daylight — A.F.Harlow
d. : following which : whereupon
whereon the people answered with a shout — Robert Browning