Final answer:
An allusion is an indirect reference in literature to a familiar concept, work, or idea, which the poet expects the reader to recognize, without explicitly naming it.
Step-by-step explanation:
A reference to something the poet is sure the reader will know is called an allusion. An allusion is a powerful literary device used by writers to indirectly reference another work or idea without explicitly naming it, relying on the reader’s familiarity with the topic. This could include references to historical events, classic literature, mythology, or even popular culture, allowing readers to draw connections and enrich their understanding of the text. For example, mentioning a “forbidden fruit” in a poem might allude to the Biblical story of Adam and Eve, adding layers of meaning concerning temptation and knowledge.