Uponpreposition
Physically above and in contact with.
Uponpreposition
Physically directly supported by.
Uponpreposition
Being followed by another so as to form a series.
Uponpreposition
At (a prescribed point in time).
Uponpreposition
On.
Uponadverb
Being the target of an action.
Uponpreposition
On; - used in all the senses of that word, with which it is interchangeable.