This is what
the parents
call their girl
child.

He or she is
your parent's
Mum or Dad.

It is a person
who is no
longer a child.

This is what
the parents
call their boy
child.

This is what you
would call someone
that you don't know
the name of.

This means more
than one person.

It refers to one
grown-up girl.

This means more
than one grown-up
girl.