whats a haiku
See more synonyms on Thesaurus.com. noun, plural haiku for 2. 1. a major form of Japanese verse, written in 17 syllables divided into 3 lines of 5, 7, and 5 syllables, and employing highly evocative allusions and comparisons, often on the subject of nature or one of the seasons. 2. a poem written in this form.