Poetry

A poem is a composition usually written in verse. Poems rely heavily on imagery, precise word choice, and metaphor; they may take the form of measures consisting of patterns of stresses (metric feet) or of patterns of different-length syllables (as in classical prosody); and they may or may not utilise rhyme. One cannot readily characterise poetry precisely. Typically though, poetry as a form of literature makes some significant use of the formal properties of the words it uses — the properties attached to the written or spoken form of the words, rather than to their meaning. Metre depends on syllables and on rhythms of speech; rhyme and alliteration depend on words that have similar pronunciation. Some recent poets, such as E. E. Cummings, made extensive use of words' visual form.

Poetry perhaps pre-dates other forms of literature: early known examples include the Sumerian Epic of Gilgamesh (dated from around 3000 B.C.), parts of the Bible, and the surviving works of Homer (the Iliad and the Odyssey). In cultures based primarily on oral traditions the formal characteristics of poetry often have a mnemonic function, and important texts: legal, genealogical or moral, for example, may appear first in verse form.

Much poetry uses specific forms: the haiku, the limerick, or the sonnet, for example. A haiku must have seventeen syllables, distributed over three lines in groups of five, seven, and five, and should have an image of a season and something to do with nature. A limerick has five lines, with a rhyme scheme of AABBA, and line lengths of 3,3,2,2,3 stressed syllables. It traditionally has a less reverent attitude towards nature.

Language and tradition dictate some poetic norms: Greek poetry rarely rhymes, Italian or French poetry often does, English and German can go either way (although modern non-rhyming poetry often, perhaps unfairly, has a more "serious" aura). Perhaps the most paradigmatic style of English poetry, blank verse, as exemplified in works by Shakespeare and by Milton, consists of unrhymed iambic pentameters. Some languages prefer longer lines; some shorter ones. Some of these conventions result from the ease of fitting a specific language's vocabulary and grammar into certain structures, rather than into others; for example, some languages contain more rhyming words than others, or typically have longer words. Other structural conventions come about as the result of historical accidents, where many speakers of a language associate good poetry with a verse form preferred by a particular skilled or popular poet.

Works for theatre (see below) traditionally took verse form. This has now become rare outside opera and musicals, although many would argue that the language of drama remains intrinsically poetic.

In recent years, digital poetry has arisen that takes advantage of the artistic, publishing, and synthetic qualities of digital media.