ILLUSION
delusion, illusion, head game
(noun) the act of deluding; deception by creating illusory ideas
illusion, fantasy, phantasy, fancy
(noun) something many people believe that is false; “they have the illusion that I am very wealthy”
illusion, semblance
(noun) an erroneous mental representation
Source: WordNet® 3.1
Etymology
Noun
illusion (countable and uncountable, plural illusions)
(countable) Anything that seems to be something that it is not.
(countable) A misapprehension; a belief in something that is in fact not true.
(countable) A magician’s trick.
(uncountable) The state of being deceived or misled.
Synonym: misapprehension
Source: Wiktionary
Il*lu"sion, n. Etym: [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.
To cheat the eye with blear illusions. Milton.
2. Hence: Anything agreeably fascinating and charning; enchantment;
witchery; glamour.
Ye soft illusions, dear deceits, arise! Pope.
3. (Physiol.)
Definition: 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.
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.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition