an allusion is a reference to a person, place, thing, or event from literature, history, art, current events, or politics. Allusions are used both to enhance a writer’s argument by adding credibility and to support a point being made, while being concise.
an allusion should always be expressed in a clear, direct way such that the reader can easily understand the reference it is making, which may involve some research given the wide range of entities to which an allusion can refer and the wide variety of content available.
The author's comment was an allusion to George Orwell’s ‘1984.’
His allusion to the tragedy of the Titanic was poignant.
There were many hidden allusions to popular art hidden in the painting.
while allusions can certainly add to a text, make sure to not overdo it or the reader may lose interest in your writing. If an allusion is not clear, it can be distracting from the main ideas of the text. Additionally, make sure to use allusions that make sense to your text and match its tone.