upon
🇺🇸
/əˈpɑːn/
🇬🇧
/əˈpɒn/
preposition
B1
on or at a particular time or event
The decision was made upon receiving the final report.
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.
translation
on or at a particular time or event; used to show a very large number or amount of something