Not compatible with reality or fact; unreasonably idealistic

unrealistic expectations.

not realistic; "unrealistic expectations"; "prices at unrealistic high levels"[ant: realistic ]

adjective

believable , practical , pragmatic , realistic , reasonable , sensible

adjective

blue sky , floating , gone * , half-baked * , impossible , impracticable , impractical , improbable , ivory-tower , nonrealistic , nonsensical , not applicable , not sensible , on cloud nine * , quixotic , reachy , romantic , silly , starry-eyed , theoretical , unreal , unworkable , utopian , visionary , absurd , affected , artificial , barmecidal , baroque , chimerical , delusive , disembodied , dramatic , fantastic , fictitious , foolish , gothic , histrionic , idealistic , illusional , illusive , illusory , imaginary , impalpable , imperceptible , incorporeal , insubstantial , intangible , melodramatic , phantasmagoric , phantasmal , phantom , platonic , staged , unfeasible , unsubstantial