dream n
1 daydream, delusion, fantasy, hallucination, illusion, imagination, pipe dream, reverie, speculation, trance, vagary, vision
2 ambition, aspiration, design, desire, goal, Holy Grail (informal) hope, notion, thirst, wish
3 beauty, delight, gem, joy, marvel, pleasure, treasure vb
4 build castles in the air or in Spain, conjure up, daydream, envisage, fancy, fantasize, hallucinate, have dreams, imagine, stargaze, think, visualize
dream up
concoct, contrive, cook up (informal) create, devise, hatch, imagine, invent, spin, think up
pipe dream
castle in the air, chimera, daydream, delusion, dream, fantasy, notion, reverie, vagary