preposition:at a higher level or position than something else
The plane flew over the city.
preposition:across from one side to the other
She walked over the bridge.
preposition:concerning or on the subject of
They had an argument over politics.
preposition:more than a specified amount, number, or level
It cost over one hundred dollars.
adverb:finished or ended
By the time we arrived, the game was over.
