High Quality Content by WIKIPEDIA articles! A couplet is a pair of lines of meter in poetry. It usually consists of two lines that rhyme and have the same meter. While traditionally couplets rhyme, not all do. A poem may use white space to mark out couplets if they do not rhyme. Couplets with a meter of iambic pentameter are called heroic couplets. The Poetic epigram is also in the couplet form. Couplets can also appear in more complex rhyme schemes. For example, Shakespearean sonnets end with a couplet.