A verse is formally a single metrical line in a poetic composition.
[2] Verse in the uncountable (mass noun) sense refers to poetry in contrast to prose.
—Emily Dickinson Blank verse is poetry written in regular, metrical, but unrhymed, lines, almost always composed of iambic pentameters.
[7][8] Of man's first disobedience, and the fruit Of that forbidden tree, whose mortal taste Brought death into the world, and all our woe, With loss of Eden, till one greater man .... —John Milton (from Paradise Lost) Free verse is usually defined as having no fixed meter and no end rhyme.
Although free verse may include end rhyme, it commonly does not.