Meaning of “above” - Learner’s Dictionary

above

adverb, preposition uk us /əˈbʌv/
HIGHER POSITION

A1 in or to a higher position than something else:

There's a mirror above the washbasin.
I could hear music coming from the room above.
MORE

A2 more than an amount or level:

It says on the box it's for children aged three and above.
Rates of pay are above average.
RANK

in a more important or advanced position than someone else:

Sally's a grade above me.
TOO IMPORTANT

too good or important for something:

No one is above suspicion in this matter.
above all

B1 most importantly:

Above all, I'd like to thank everyone.

(Definition of “above adverb, preposition” from the Cambridge Learner’s Dictionary © Cambridge University Press)