In poetry.....consist of four lines

In poetry, a quatrain consists of four lines. A quatrain is a stanza or poem consisting of four lines, often with alternate rhymes. It is a common poetic form used in many different types of poetry. The quatrain can be found in many different styles of poetry including sonnets, ballads, and odes. The four lines in a quatrain can have different meters and rhyme schemes depending on the poem's style and the poet's intention.