dis·il·lu·sion
ˌdis-ə-ˈlü-zhən
: the condition of being disenchanted : the condition of being dissatisfied or defeated in expectation or hope
suffered romantic disillusions
dis·il·lu·sion·ment
ˌdisə̇ˈlüzhənmənt also -sə̇lˈyü-
plural -s
1
: the state or process of being disillusioned
the disillusionment of youth at the way the world was run—
Agnes Repplier
another novel about disillusionment with communism—
Granville Hicks
2
: an instance of being disillusioned
a study of the disillusionments of the Australian radio world—
Leslie Rees
Love words? Need even more definitions?
Merriam-Webster unabridged



