What is the meaning of über?

Alternative form of uber.

Alternative form of uber.

[with accusative or dative] above, over (spatially)

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

[with accusative] via, through, by way of

[with accusative] across

[with accusative] during, for, over a time period

[with accusative] about, on the topic of

around, among

over, more than, above (a quantity)

beyond

at (when 'over' or 'about' could roughly be substituted)

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

over

Source: wiktionary.org