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.”
delusion implies an inability to distinguish between what is real and what only seems to be real, often as the result of a disordered state of mind.
delusions of persecution
illusion implies a false ascribing of reality based on what one sees or imagines.
an illusion of safety
hallucination implies impressions that are the product of disordered senses, as because of mental illness or drugs.
suffered from terrifying hallucinations
mirage in its extended sense applies to an illusory vision, dream, hope, or aim.
claimed a balanced budget is a mirage
Example Sentences
The video game is designed to give the illusion that you are in control of an airplane. They used paint to create the illusion of metal. She says that all progress is just an illusion.
Recent Examples on the WebThe Red Sox, meanwhile, are fast approaching the point where even the illusion of contention is hard to sustain – particularly given the mounting injuries that seem to befall them on a nightly basis. Alex Speier, BostonGlobe.com, 23 Aug. 2022 Elegant, layered drapes—instead of blinds or valances—pair with light-colored curtain rods and hardware, allowing in plenty of natural light while giving the illusion of more height. Kristina Mcguirk, Better Homes & Gardens, 21 Apr. 2022 There’s a large outdoor patio, reached through sliding glass doors, covered in real grass, giving the illusion of stepping out to a backyard. Nancy Keates, WSJ, 19 Jan. 2022 The music tiptoed along the knife edge of its key, its tones, giving the illusion of freedom when there were always far more missteps than safe harbors and nimble plunges into grace. Greg Jackson, The New Yorker, 22 Nov. 2021 The main drag, when not underwater, has heaps of wet, packed sand giving the illusion of hills. Kirsten Fiscus, USA TODAY, 1 Sep. 2021 Then the local ban — which state Republican leaders had encouraged the judge to reinstate — removed for many voters the illusion of protection in North Carolina. Hannah Schoenbaum, BostonGlobe.com, 28 Aug. 2022 In an on-trend graphic pattern, this bikini has a supportive underwire top with pretty tulle illusion panels, adjustable straps and lace-up back detailing that can be worn a multitude of ways. Ingrid Schmidt, The Hollywood Reporter, 24 Aug. 2022 The piece features padded shoulders, a tie-front decoration, and cutouts at the waist giving the illusion of a two-piece set. Quinci Legardye, Harper's BAZAAR, 20 Aug. 2022 See More
Word History
Etymology
Middle English, from Anglo-French, from Late Latin illusion-, illusio, from Latin, action of mocking, from illudere to mock at, from in- + ludere to play, mock — more at ludicrous