Object.
The person, or place, or thing, or state to which something is done is called the Object.
I shall/will have to scold him.
Some pollute Anuradhapura in pilgrimages.
Pass the milk, please.
I dislike toothache.
Here him, Anuradhapura, milk and toothache are the Objects in the sentences.
Singular Objects.
They are: me, you, him, her, it and A name or A place or A thing or A state/condition (standing as an Object).
Plural Objects.
They are: us, you, them and Names or Places or Things or State(s)/Condition(s) [standing as Objects].