What distinguishes a limerick from other forms of poetry?

A limerick is characterized primarily by its distinct rhythm and playful, often humorous intent. This form of poetry typically consists of five lines with a specific meter: the first, second, and fifth lines generally have three beats and rhyme with one another, while the third and fourth lines have two beats and share a different rhyme. The humorous or whimsical quality often found in limericks sets this form apart from other poetic styles, which may focus on a range of themes—both serious and light-hearted. In contrast, the serious tone associated with some poetry forms, the use of metaphors that might be prevalent in other styles, and the historical significance of various poetic forms do not specifically define a limerick’s structure or purpose. Therefore, the emphasis on the combination of its rhythm and humorous nature is what truly distinguishes a limerick.