Definition of "upon"
upon
preposition
Being followed by another so as to form a series.
Quotations
No news of them? Why, so: and I know not what's spend in the search: why thou loss upon loss! the thief gone with so much, and so much to find the thief; and no satisfaction, no revenge: nor no ill luck stirring but what lights on my shoulders; no sighs but of my breathing; no tears but of my shedding.
c. 1596–1598 (date written), William Shakespeare, “The Merchant of Venice”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene i]
On.
Quotations
Although the Celebrity was almost impervious to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.
1897 December (indicated as 1898), Winston Churchill, chapter V, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.