A collection of lines in a poem is known as a stanza. When a poem is organised into stanzas, each segment is related through a rhythmic and frequently thematic structure. Typically, stanzas are separated by blank lines.
Stanzas are frequently described in terms of their line count. Counting from shortest to longest, couplets, tercets, quatrains, quintains, and sestets are stanzas with two, three, four, five, and six lines, respectively. For instance, an Elizabethan sonnet consists of three quatrains and a couplet.
Stanzas are comparable to prose paragraphs in that the lines of a stanza contain connected ideas. They may also have a consistent rhyme system. Unless a stanza is designed to stand out in some way, the rhythm and rhyme scheme of the opening stanza establishes the pattern for the rest.