"Allution" does not appear to be a standard English word. If you meant "allusion," it refers to a brief and indirect reference to a person, place, thing, event, or idea in literature, typically to enrich the meaning of the text.
Allution
Allusion is a literary device that references a person, place, event, or work of art, often to create a deeper meaning. For example, in Shakespeare's "Romeo and Juliet," the phrase "all the world's a stage" alludes to the idea that life is a performance, echoing themes from other works of literature. Another example is in the song "Uptown Funk" by Mark Ronson, where the mention of "James Bond" alludes to the suave, sophisticated character from the film series. These references enrich the text by connecting it to broader cultural or historical contexts.