upon
🇺🇸
/əˈpɑːn/
🇬🇧
/əˈpɒn/
preposition
B1
on or at a particular time or event
The decision was made upon receiving the final report.
最終報告を受け取った後、決定が下されました。
R
used to show a very large number or amount of something
There were thousands upon thousands of stars visible upon looking at the night sky.
夜空を見上げると、何千もの星が見えました。
translation
〜の時に, 大量の