Concrete Poetry is “a type of poetry where the visual arrangement of text and space forms a meaningful shape or image or emphasizes nonlinguistic elements in its meaning, such as a typeface that creates a visual image of the topic.” (Poetry Foundation)
“I am writing in a vacuum, since even if my reader already knows what he means by concrete poetry he does not know what I mean.” Stanley Cook, Introduction, Seeing Your Meaning
Other forms of concrete poetry – Word hoards: masterpieces of concrete poetry – in pictures