Merriam-Webster's Collegiate® Dictionary, 11th Edition
DREAM
I. noun
Usage: often attributive
Etymology: Middle English dreem, from Old English drēam noise, joy, and Old Norse draumr dream; akin to Old High German troum dream
Date: 13th century
a series of thoughts, images, or emotions occurring during sleep, an experience of waking life having the characteristics of a dream: as, a visionary creation of the imagination ; daydream , a state of mind marked by abstraction or release from reality ; reverie , an object seen in a dreamlike state ; vision , something notable for its beauty, excellence, or enjoyable quality ,
4. a strongly desired goal or purpose , something that fully satisfies a wish ; ideal , dreamful adjective dreamfully adverb dreamfulness noun dreamless adjective dreamlessly adverb dreamlessness noun dreamlike adjective
II. verb (dreamed or dreamt; dreaming)
Date: 13th century
intransitive verb to have a dream, to indulge in daydreams or fantasies , to appear tranquil or dreamy , transitive verb to have a dream of, to consider as a possibility ; imagine , to pass (time) in reverie or inaction