What is poetry

What is poetry/a poem and how can you tell the difference between poetry and prose? I think poetry is a assortment of words that convey deep emotional feeling that can be interpreted in different ways. There are so many possibilities that it is hard to exactly say what poetry is. Poetry could be a long, short, funny, sad, brilliant and grate. But the format that is hard to define. Is there a difference between poetry and prose? Can something be poetic but still not be a pome? I think that something can be poetic that is not a pome. I think that there is a difference between a poetry and a prose. But in my opinion it is what you make it.