Anything poetic either relates to the art of poetry or has the romantic images of poetry. A great speech can be poetic. An orange-red sunset at the beach can also be poetic.
The word poetic comes from the Greek poietikos for "pertaining to poetry." A poetic drama is one written in verse. Anything romantic or lyrical is also poetic. A painter’s use of colors could be poetic. Poetic justice happens when you set a trap to catch a rabbit but get caught in it yourself. If you get carried away with a metaphor, you use poetic license. Don’t try to drive with it! Poetic language doesn’t get you out of any tickets.