What is an epigram?

An epigram is defined as a concise and often witty statement that encapsulates a thought or observation in a clever way. The hallmark of an epigram is its brevity combined with its ability to provoke reflection or amusement. It typically expresses a single idea or sentiment in a manner that is both striking and memorable, which aligns perfectly with the characteristics outlined in the correct choice.

In contrast, options like a lengthy narrative poem represent a very different form of literature characterized by extended complexity and story development. Similarly, the notion of a form of tragedy in theater refers to a dramatic structure that explores serious themes and often involves significant conflict, which does not fit the definition of an epigram. Lastly, a detailed description of nature suggests a focus on imagery and sensory details rather than the succinct, clever turns of phrase that define epigrams. Thus, the definition of an epigram as a short, witty saying captures its essence accurately.