Everyone has their own definition. You prefer some styles over another. This or that, depending on your mood. I liken it to wine: your taste buds evolve over the years, but you always have that certain sweet spot.
What is poetry to you?
For me, each poem is a life song. Everyone can sing along, no matter their voice. Or, they can choose not to sing at all. Maybe, they'll come back to the song with a greater appreciation and understanding years later. No matter, you can compose your own song, sing your own lyrics, develop your own melody. Sometimes, your heart and mouth get ahead of your mind. Sing it out and share with the world.