upstairs
The French word 'au-dessus' is used to express the location of something or someone being upstairs. It can be used in a sentence like 'Je suis au-dessus', meaning 'I am upstairs'.
The bird is flying above the trees
This sentence describes an action of a bird flying, where 'au-dessus' is used to specify the location of the action in relation to the trees - in this case, above.
The shelf is above the table
This sentence describes a static situation where a shelf ('l'étagère') is located in relation to the table. 'Au-dessus' is used here to indicate the location of the shelf - it is above the table.
He lives above the bakery
This sentence provides information about someone's dwelling place. The preposition 'au-dessus' tells us that the place of residents is not on the same level as the bakery, but on a higher level - above the bakery.