The changed definition

When she's seven,
IT means admiration.
When she's eleven,
IT changes to adoration.

When she's sixteen,
IT's her life
When she's twenty,
IT's the only thing that's right

At twenty-six,
IT's meaning's not sure anymore.
At twenty-nine,
IT's what she wants no more.

With time IT's definition change,
the constant thing is only the name.
That is when she does realize,
IT's what now defines her life.