upon
Pronunciation:
/əˈpɒn//əˈpɑn/adverb
Definitions
Being the target of an action.
Example: He was set upon by the agitated dogs
preposition
Definitions
Physically above and in contact with.
Example: Place the book upon the table.
Physically directly supported by.
Example: She balanced upon one foot.
Being followed by another so as to form a series.
Example: hours upon hours, years upon years, mile upon mile of desert
At (a prescribed point in time).
Example: The contract was rendered void upon his death.