The Collaborative International Dictionary of English v.0.48:

Shock \Shock\, v. t. [imp. & p. p. Shocked; p. pr. & vb. n.
   Shocking.] [OE. schokken; cf. D. schokken, F. choquer, Sp.
   chocar. [root]161. Cf. Chuck to strike, Jog, Shake,
   Shock a striking, Shog, n. & v.]
   1. To give a shock to; to cause to shake or waver; hence, to
      strike against suddenly; to encounter with violence.
      [1913 Webster]

            Come the three corners of the world in arms,
            And we shall shock them.              --Shak.
      [1913 Webster]

            I shall never forget the force with which he shocked
            De Vipont.                            --Sir W.
                                                  Scott.
      [1913 Webster]

   2. To strike with surprise, terror, horror, or disgust; to
      cause to recoil; as, his violence shocked his associates.
      [1913 Webster]

            Advise him not to shock a father's will. --Dryden.
      [1913 Webster]

   3. (Physiol.) To subject to the action of an electrical
      discharge so as to cause a more or less violent depression
      or commotion of the nervous system.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Shocking \Shock"ing\, a.
   Causing to shake or tremble, as by a blow; especially,
   causing to recoil with horror or disgust; extremely offensive
   or disgusting.
   [1913 Webster]

         The grossest and most shocking villainies. --Secker.
   [1913 Webster] -- Shock"ing*ly, adv. -- Shock"ing*ness,
   n.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

shocking
    adj 1: glaringly vivid and graphic; marked by sensationalism;
           "lurid details of the accident" [syn: lurid,
           shocking]
    2: giving offense to moral sensibilities and injurious to
       reputation; "scandalous behavior"; "the wicked rascally
       shameful conduct of the bankrupt"- Thackeray; "the most
       shocking book of its time" [syn: disgraceful, scandalous,
       shameful, shocking]

Moby Thesaurus II by Grady Ward, 1.0:

188 Moby Thesaurus words for "shocking":
   abhorrent, abominable, abrupt, absolute, amazing, appalling,
   arrant, astonishing, astounding, atrocious, awe-inspiring, awesome,
   awful, baneful, base, beastly, beneath contempt, beneath one,
   blameworthy, brutal, burning, cheap, classical, complete,
   consummate, contemptible, crass, crying, debasing, decided,
   definitive, degrading, demeaning, deplorable, desperate,
   despicable, detestable, dire, direful, disgraceful, disgusting,
   distressing, downright, dread, dreaded, dreadful, egregious,
   electrifying, enormous, fell, fetid, filthy, flagrant, formidable,
   foul, frightful, fulsome, ghastly, ghoulish, glaring, grievous,
   grim, grisly, gross, gruesome, gutter, hasty, hateful, headlong,
   heinous, hideous, horrendous, horrible, horrid, horrific,
   horrifying, humiliating, humiliative, impetuous, impulsive,
   infamous, infra dig, infra indignitatem, intolerable, jarring,
   jolting, lamentable, loathsome, lousy, macabre, mind-blowing,
   mind-boggling, monstrous, morbid, nasty, nauseating, nauseous,
   nefarious, nerve-shattering, noisome, notorious, numbing,
   obnoxious, odious, offensive, opprobrious, out-and-out, outrageous,
   outright, perfect, pitiable, pitiful, positive, precious,
   precipitant, precipitate, precipitous, profound, pronounced,
   proper, quick, rank, redoubtable, regrettable, regular,
   reprehensible, repulsive, revolting, rotten, sad, scandalous,
   schlock, schrecklich, scurvy, shabby, shameful, shattering, shoddy,
   sickening, sordid, sorry, speedy, squalid, staggering, stark,
   stark-staring, startling, striking, stunning, stupefying, sudden,
   superlative, surpassing, surprising, swift, terrible, terrific,
   the veriest, thorough, thoroughgoing, too bad, total, tragic,
   tremendous, unanticipated, unbearable, unbecoming, unclean,
   unconscionable, undeniable, unequivocal, unexpected, unforeseen,
   unlooked-for, unmitigated, unpredicted, unqualified, unrelieved,
   unspeakable, unspoiled, unworthy of one, utter, vile, villainous,
   woeful, worst, worthless, wretched