'Illusion' definitions:

Definition of 'illusion'

From: WordNet
noun
An erroneous mental representation [syn: illusion, semblance]
noun
Something many people believe that is false; "they have the illusion that I am very wealthy" [syn: illusion, fantasy, phantasy, fancy]
noun
The act of deluding; deception by creating illusory ideas [syn: delusion, illusion, head game]
noun
An illusory feat; considered magical by naive observers [syn: magic trick, conjuring trick, trick, magic, legerdemain, conjuration, thaumaturgy, illusion, deception]

Definition of 'Illusion'

From: GCIDE
  • Illusion \Il*lu"sion\, n. [F. illusion, L. illusio, fr. illudere, illusum, to illude. See Illude.]
  • 1. An unreal image presented to the bodily or mental vision; a deceptive appearance; a false show; mockery; hallucination. [1913 Webster]
  • To cheat the eye with blear illusions. --Milton. [1913 Webster]
  • 2. Hence: Anything agreeably fascinating and charming; enchantment; witchery; glamour. [1913 Webster]
  • Ye soft illusions, dear deceits, arise! --Pope. [1913 Webster]
  • 3. (Physiol.) A sensation originated by some external object, but so modified as in any way to lead to an erroneous perception; as when the rolling of a wagon is mistaken for thunder. [1913 Webster]
  • Note: Some modern writers distinguish between an illusion and hallucination, regarding the former as originating with some external object, and the latter as having no objective occasion whatever. [1913 Webster]
  • 4. A plain, delicate lace, usually of silk, used for veils, scarfs, dresses, etc.
  • Syn: Delusion; mockery; deception; chimera; fallacy. See Delusion. Illusion, Delusion. Illusion refers particularly to errors of the sense; delusion to false hopes or deceptions of the mind. An optical deception is an illusion; a false opinion is a delusion. --E. Edwards. [1913 Webster]

Synonyms of 'illusion'

From: Moby Thesaurus