A series of images, ideas, emotions, and sensations occurring involuntarily in the mind during certain stages of sleep, a cherished desire, someone or something wonderful, verb_ experience while sleeping, intransitive verb_ To experience a dream in sleep, To daydream, To experience a dream of while asleep, transitive verb_ To have a dream of; to see, or have a vision of, in sleep, or in idle fancy; -- often followed by an objective clause, to pass in revery or inaction; to spend in idle vagaries