1. [n]  refuge from danger or observation; "he felt secure in his father's shadow"
2. [n]  something existing in perception only; "a ghostly apparition at midnight"
3. [n]  a clue that something has been present; "there wasn't a trace of evidence for the claim"
4. [n]  a premonition of something adverse; "a shadow over his happiness"
5. [n]  an unilluminated area; "he moved off into the darkness"
6. [n]  an inseparable companion; "the poor child was his mother's shadow"
7. [n]  a spy employed to follow someone and report their movements
8. [n]  shade within clear boundaries
9. [v]  follow, usually without the person's knowledge; "The police are shadowing her"
10. [v]  cast a shadow
11. [v]  cast a shadow over

Shadow
Investigative journalist Bob Woodward, the co-author of ALL THE PRESIDENT`S MEN, examines presidential power after Watergate through key events in the Carter, Ford, Reagan, Bush, and Clinton administrations. He sees a diminishing respect for the office and a growing cynicism and interest in salaciousness by the public and the press.

more details ...

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

2. \Shad"ow\, v. t. [imp. & p. p. {Shadowed}; p. pr. & vb.
   n. {Shadowing}.] [OE. shadowen, AS. sceadwian. See {adow},
   n.]
   1. To cut off light from; to put in shade; to shade; to throw
      a shadow upon; to overspead with obscurity.
            The warlike elf much wondered at this tree, So fair
            and great, that shadowed all the ground. --Spenser.
   2. To conceal; to hide; to screen. [R.]
            Let every soldier hew him down a bough. And bear't
            before him; thereby shall we shadow The numbers of
            our host.                             --Shak.
   3. To protect; to shelter from danger; to shroud.
            Shadowing their right under your wings of war.
                                                  --Shak.
   4. To mark with gradations of light or color; to shade.
   5. To represent faintly or imperfectly; to adumbrate; hence,
      to represent typically.
            Augustus is shadowed in the person of [AE]neas.
                                                  --Dryden.
   6. To cloud; to darken; to cast a gloom over.
            The shadowed livery of the burnished sun. --Shak.
            Why sad? I must not see the face O love thus
            shadowed.                             --Beau. & Fl.
   7. To attend as closely as a shadow; to follow and watch
      closely, especially in a secret or unobserved manner; as,
      a detective shadows a criminal.
   

A syntax-directed compiler written by Barnett and Futrelle in 1962. It was the predecessor to SNOBOL(?)

[Sammet 1969, p. 448, 605].

used in Col. 2:17; Heb. 8:5; 10:1 to denote the typical relation of the Jewish to the Christian dispensation.