disillusion?

what is exactly this word refer to?
i think it could be the english titile of my novel,
but still i don't know exactly the meaning?

vocation

will be on vocation from tomorrow till 21 May,
happy holiday to everybody.

hope no call from office,
but it happen all the time,
i can't escape, lolz.

anyway let's start having fun.

Cheer.
KB