What is the meaning of über?

Alternative form of uber.

Alternative form of uber.

[with accusative or dative] above, over

[with accusative] about, concerning, over, at (in reference to)

[with accusative] via, through, by way of

[with accusative] across

[with accusative] during, for, over

[with accusative] about, on the topic of

around, among

[with accusative] over, more than, above

[with accusative] beyond

at

left over, remaining, replaces übrig in all its predicative instances, including those lexicalized as verb prefixoids.

over

Source: wiktionary.org