The Oxford Dictionaries defines uber as: Denoting an outstanding or supreme example of a particular kind of person or thing.
Example given:
‘an uberbabe’
‘the uberregulator’
The origin of 'uber' is the German word über, meaning ‘over’.
Each year, the Oxford Dictionary makes writing professionally easier and more fun by adding new words to its dictionary-- meaning: new, real words are added to our vocabularies every year.
See the recent updates to the OED here.
Learn the 10 Best New Words Added to the Oxford Dictionary in 2017 compiled by OneCountry.