The Collaborative International Dictionary of English v.0.48:

Shadow \Shad"ow\ (sh[a^]d"[-o]), n. [Originally the same word as
   shade. [root]162. See Shade.]
   1. Shade within defined limits; obscurity or deprivation of
      light, apparent on a surface, and representing the form of
      the body which intercepts the rays of light; as, the
      shadow of a man, of a tree, or of a tower. See the Note
      under Shade, n., 1.
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   2. Darkness; shade; obscurity.
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            Night's sable shadows from the ocean rise. --Denham.
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   3. A shaded place; shelter; protection; security.
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            In secret shadow from the sunny ray,
            On a sweet bed of lilies softly laid. --Spenser.
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   4. A reflected image, as in a mirror or in water. --Shak.
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   5. That which follows or attends a person or thing like a
      shadow; an inseparable companion; hence, an obsequious
      follower.
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            Sin and her shadow Death.             --Milton.
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   6. A spirit; a ghost; a shade; a phantom. "Hence, horrible
      shadow!" --Shak.
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   7. An imperfect and faint representation; adumbration;
      indistinct image; dim bodying forth; hence, mystical
      representation; type.
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            The law having a shadow of good things to come.
                                                  --Heb. x. 1.
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            [Types] and shadows of that destined seed. --Milton.
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   8. A small degree; a shade. "No variableness, neither shadow
      of turning." --James i. 17.
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   9. An uninvited guest coming with one who is invited. [A
      Latinism] --Nares.
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            I must not have my board pastered with shadows
            That under other men's protection break in
            Without invitement.                   --Massinger.
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   Shadow of death, darkness or gloom like that caused by the
      presence or the impending of death. --Ps. xxiii. 4.
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