preposition

Located higher than, in a higher position, or at a higher point
On top of something, higher than something else
Beyond or exceeding something, higher in position than something

adverb

Upwards, towards a higher place
Earlier in a text or discussion, at a higher level than previously mentioned

Example

preposition

1. The plane is flying above the clouds.
2. The picture is hanging above the fireplace.
3. The captain is ranked above the lieutenant.

adverb

1. The bird soared above the trees.
2. The hot air balloon rose steadily above the city.
3. The plane flew high above.