How many lines are there in a couplet?

A couplet is defined as a pair of lines in poetry that typically rhyme and have the same meter. This form is often used to convey a complete thought or idea in a concise manner. The structure of two lines is what distinguishes a couplet from other poetic forms. For instance, a tercet consists of three lines, while a quatrain encompasses four lines. Thus, understanding that a couplet consists of precisely two lines provides clarity on the structure and the nature of this poetic form.