What is a poem?

https://www.theatlantic.com/entertainment/archive/2013/11/what-is-a-poem/281835/

Extract

“There is at least one kind of utility that a poem can embody: ambiguity. Ambiguity is not what school or society wants to instill. You don’t want an ambiguous answer as to which side of the road you should drive on, or whether or not pilots should put down the flaps before take-off. That said, day-to-day living—unlike sentence-to-sentence reading—is filled with ambiguity: Does she love me enough to marry? Should I fuck him one more time before I dump him?

But such observations still don’t tell us much about what a poem really is. Try crowd-sourcing for an answer. If you search Wikipedia for “poem,” it redirects to “poetry”: “a form of literary art which uses aesthetic and rhythmic qualities of language—such as phonoaesthetics, sound symbolism, etc.” Fine English-professor speak, but it belies the origins of the word. “Poem” comes from the Greek poíēma, meaning a “thing made,” and a poet is defined in ancient terms as “a maker of things.” So if a poem is a thing made, what kind of thing is it?

I’ve heard other poets define poems in organic terms: wild animals—natural, untamable, unpredictable, raw. But the metaphor quickly falls apart. Such animals live on their own, utterly unconcerned with the names humans put upon them. In inorganic terms, the poet William Carlos Williams called poems “little machines,” as he treated them as mechanical, human-engineered, and precise. But here too, the metaphor breaks down. A worn-out part on an automobile can be switched out with a nearly identical part and run as it did before. In a poem, a word exchanged for another word (even a close synonym) can alter the entire functioning of the poem.”