(1) german word for "above" or "over" (correct spelling "über")
(2) Became popular in the american language through its occurence in a phrase of the old nazi-time german anthem, re-used by punk bands ("california über alles")
(3) Is now used as a substitute for "really" or "very" etc.
(1) Ich sehe die Sterne über mir (I see the stars above me)
(2) "...Deutschland über Alles..." (Germany above All Things)