Question

What does preposition mean?(could you give me some example sentences)

Answer 1

Expressing  a relation to another word.
a man on a table
she made it home on time
she arrive after dinner

Answer 2

A preposition is a word that describes the location, direction, or time. For example:
 We went to the car.
The dog is under the table.
We climbed up the mountain.
I hope this helps!