illusion
Concise Oxford English Dictionary © 2008 Oxford University Press:
illusion /ɪˈl(j)uːʒ(ə)n/
▶noun a false idea or belief.
■ a deceptive appearance or impression.
■ a false or unreal perception.
– phrases
be under the illusion that believe mistakenly that.
be under the illusion that believe mistakenly that.
– derivatives
illusional adjective,
illusionary adjective.
illusional adjective,
illusionary adjective.
– origin ME: via OFr. from L. illusio(n-), from illudere ‘to mock’.
'illusion' also found in these Oxford entries:
