noun | the expression or embodiment of beautiful or elevated thought, imagination, or feeling, in language and a form adapted to stir the imagination and the emotions.
Canadian Oxford Dictionary, 2nd Edition
Traditional poetry is in meter form and has a distinctive style and pattern, usually found in verse form, called a stanza made up of meters created by feet. Poetry allows for different interpretations of the text through the use of forms and conventions, making use of syllable and/or line count, punctuation, and line formation, and other tools. Besides rhythm and rhyme, poetry uses various devices such as onomatopoeia, alliteration, assonance, and/or stylistic elements like ambiguity, symbolism and irony, as well as figures of speech such as simile, metaphor, and metonymy.
There are over 50 types of poetry, such as sonnets, acrostic poems, and cinquains. Poems fit into these various forms or categories based on elements such as the number of lines, and whether or not it rhymes. Some poetry, like the Blank Verse, doesn’t rhyme, but does use regular metrical lines, usually in iambic pentameter. There is also Free Verse poetry that doesn’t follow any rules of traditional poetry. Meanwhile a Prose Poem looks like a piece of prose, but uses poetic qualities like heightened imagery and prominent rhythms, causing it to read like poetry.