Definition of illusion
1 a obsolete : the action of deceiving b (1) : the state or fact of being intellectually deceived or misled : misapprehension (2) : an instance of such deception
2 a (1) : a misleading image presented to the vision (2) : something that deceives or misleads intellectually b (1) : perception of something objectively existing in such a way as to cause misinterpretation of its actual nature (2) : hallucination 1 (3) : a pattern capable of reversible perspective
3 : a fine plain transparent bobbinet or tulle usually made of silk and used for veils, trimmings, and dresses
illusionalplay \-ˈlüzh-nəl, -ˈlü-zhə-nəl\ adjective
Examples of illusion in a sentence
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.
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.”
Origin and Etymology of illusion
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
First Known Use: 14th century
Synonym Discussion of illusion
ILLUSION Defined for English Language Learners
Definition of illusion for English Language Learners
: something that looks or seems different from what it is : something that is false or not real but that seems to be true or real
: an incorrect idea : an idea that is based on something that is not true
ILLUSION Defined for Kids
Definition of illusion for Students
1 : something that is false or unreal but seems to be true or real <The video game creates the illusion of flying.>
2 : a mistaken idea <She had no illusions about her chances of winning.>
Medical Definition of illusion
illusional\-ˈüzh-nəl, -ən-əl\play adjective
Seen and Heard
What made you want to look up illusion? Please tell us where you read or heard it (including the quote, if possible).