dream - noun, often attributive \ˈdrēm\
One : a series of thoughts, images, or emotions occurring during sleep 
Two : an experience of waking life having the characteristics of a dream
a : a visionary creation of the imagination : daydream 
b : a state of mind marked by abstraction or release from reality 
c : an object seen in a dreamlike state : vision 
Three 
a: something notable for its beauty, excellence, or enjoyable quality 
Four 
a : a strongly desired goal or purpose  
b : something that fully satisfies a wish : ideal 
— dream·ful \-fəl\ adjective 
— dream·ful·ly \-fə-lē\ adverb 
— dream·ful·ness noun 
— dream·like \ˈdrēm-ˌlīk\ adjective 
Chimera, Daydream, Fantasy, Illusion, Visualization, Utopia