Haiku are traditional Japanese poems consisting of three lines--in 5/7/5 syllables; always set during a particular season or month as indicated by a kigo, or traditional season-word, which establishes mood; avoid symbolism or puns; and employ "the technique of cutting"--dividing the poem into 2 thoughts, wherein the parts can stand independently from each other, but each one must also enrich the reader's understanding of the other section.
I got the 5/7/5 part down...I think.
