Hey Webster, define poetry, please

Teagan Lynn Comment: Our wise www.dictionary.com proclaims poetry as "the art or work of a poet," but I think the poets define it better. Two poems, both titled "Ars Poetica," make me crave beautiful poetry.

From the first, "Ars Poetica," by Archibald Macleish, I will only pull one stanza:

A poem should not mean
But be.

And the second, "Ars Poetica," by Vicente Huidobro, as translated by David M. Guss

Let poetry be like a key
Opening a thousand doors.
A leaf falls; something flies by;
Let all the eye sees be created
And the soul of the listener tremble.

Invent new worlds and watch your word;
The adjective, when it doesn't give life, kills it.
We are in the age of nerves.
The muscle hangs,
Like a memory, in museums;
But we are not the weaker for it:
True vigor
Resides in the head.

Oh Poets, why sing of roses!
Let them flower in your poems;

For us alone
Do all things live beneath the Sun.

The poet is a little God.

Huidobro, Vicente. "Ars Poetica."
Literature: Reading Fiction, Poetry, Drama, and the Essay.
Comp. Robert DiYanni. McGraw-Hill, 1998.

What do you think defines a poet? At what point does one go from one who writes to a writer?