The Collaborative International Dictionary of English v.0.48:

Celestial \Ce*les"tial\, n.
   1. An inhabitant of heaven. --Pope.
      [1913 Webster]

   2. A native of China; a Chinaman; a Chinese. [Colloq.]
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Celestial \Ce*les"tial\, a. [OF. celestial, celestied, fr. L.
   caelestic, fr. caelum heaved. See Cell.]
   1. Belonging to the a["e]rial regions, or visible heavens.
      "The twelve celestial signs." --Shak.
      [1913 Webster]

   2. Of or pertaining to the spiritual heaven; heavenly;
      divine. "Celestial spirits." "Celestial light," --Milton.
      [1913 Webster]

   3. Of, pertaining to, or characteristic of, the Chinese, or
      Celestial, Empire, of the Chinese people.
      [Webster 1913 Suppl.]

   Celestial city, heaven; the heavenly Jerusalem. --Bunyan.

   Celestial empire, China; -- so called from the Chinese
      words, tien chan, Heavenly Dynasty, as being the kingdom
      ruled over by the dynasty appointed by heaven. --S. W.
      Williams.
      [1913 Webster]

WordNet (r) 3.0 (2006):

celestial
    adj 1: of or relating to the sky; "celestial map"; "a heavenly
           body" [syn: celestial, heavenly]
    2: relating to or inhabiting a divine heaven; "celestial
       beings"; "heavenly hosts" [syn: celestial, heavenly]
    3: of heaven or the spirit; "celestial peace"; "ethereal
       melodies"; "the supernal happiness of a quiet death" [syn:
       celestial, ethereal, supernal]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "celestial":
   Elysian, Olympian, astral, astronomical, beatific, blessed, divine,
   elysian, empyreal, empyrean, ethereal, godly, heavenly, immortal,
   otherworldly, paradisaic, spiritual, sublime, supernal,
   supernatural, transcendental, transmundane, unearthly