A verse is formally a single metricalline in a poetic composition.[1] However, verse has come to represent any grouping of lines in a poetic composition, with groupings traditionally having been referred to as stanzas.[2]
Verse in the uncountable (mass noun) sense refers to poetry in contrast to prose.[3] Where the common unit of verse is based on meter or rhyme, the common unit of prose is purely grammatical, such as a sentence or paragraph.[4]
Verse in the second sense is also used pejoratively in contrast to poetry to suggest work that is too pedestrian or too incompetent to be classed as poetry.