What is the word origin of allusion?

Allusion was borrowed into English in the 16th century. It derives from the Latin verb alludere, meaning "to play with," "to jest," or "to refer to," as does its cousin allude, meaning "to make indirect reference" or "to refer." Alludere, in turn, derives from a combination of the prefix ad- ("to or toward") and ludere ("to play"). Ludere is a Latin word that English speakers have enjoyed playing with over the years, creating collude, delude, elude, and prelude, just to name a few.

Allusion and Illusion

Allusion and illusion may share some portion of their ancestry (both words come in part from the Latin word ludere, meaning “to play”), and sound quite similar, but they are distinct words with very different meanings. An allusion is an indirect reference, whereas an illusion is something that is unreal or incorrect. Each of the nouns has a related verb form: allude “to refer indirectly to,” and illude (not a very common word), which may mean “to delude or deceive” or “to subject to an illusion.”