The Collaborative International Dictionary of English v.0.48:

Dreamland \Dream"land`\, n.
   An unreal, delightful country such as in sometimes pictured
   in dreams; region of fancies; fairyland.
   [1913 Webster]

         [He] builds a bridge from dreamland for his lay.
                                                  --Lowell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dreamland
    n 1: a pleasing country existing only in dreams or imagination
         [syn: never-never land, dreamland, dreamworld]

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "dreamland":
   Agapemone, Arcadia, Big Rock-Candy Mountain, Canaan,
   Cloudcuckooland, Cockaigne, Eden, Eldorado, Erewhon,
   Garden of Eden, Goshen, Happy Valley, Land of Youth, Laputa,
   Never-Never-land, Neverland, New Atlantis, Pandemonium, Quivira,
   Shangri-la, Utopia, airy nothing, autism, beauty sleep, beddy-bye,
   bedtime, blanket drill, bubble, bye-bye, chimera, cloudland,
   daydream, deception, deluded belief, delusion, dereism, doze,
   dream, dream vision, dreamworld, drowse, dystopia, faerie,
   fairyland, false belief, fitful sleep, heaven, hibernation,
   ignis fatuus, illusion, kakotopia, kingdom come, land of Nod,
   land of dreams, land of enchantment, land of faerie,
   land of plenty, land of promise, light sleep, lotus land,
   millennium, misbelief, misconception, paradise, pipe dream,
   promised land, repose, self-deceit, self-deception, self-delusion,
   shut-eye, silken repose, sleep, sleepland, sleepwalking, slumber,
   slumberland, snoozle, somnambulism, somniloquy, somnus, trick,
   trip, unconsciousness, utopia, vapor, winter sleep, wonderland,
   wrong impression