lullaby

from WordNet (r) 3.0 (2006)

lullaby
    n 1: a quiet song intended to lull a child to sleep [syn:
         {lullaby}, {cradlesong}, {berceuse}]
    2: the act of singing a quiet song to lull a child to sleep
       [syn: {lullaby}, {cradlesong}]

from The Collaborative International Dictionary of English v.0.48

lullaby \lull"a*by\, n. [From {Lull}, v. t. ]
   1. A song to quiet babes or lull them to sleep; that which
      quiets. --Shak.
      [1913 Webster]

   2. Hence: Good night; good-by. [Obs.] --Shak.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "lullaby":
      Schlummerlied, Wiegenlied, anesthetic, berceuse, cradlesong,
      hypnotic, mandrake, morphia, morphine, nightcap, opiate, opium,
      poppy, sedative, sleep-bringer, sleep-inducer, sleep-producer,
      somnifacient, soporific

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