The Collaborative International Dictionary of English v.0.48:

Abomination \A*bom`i*na"tion\, n. [OE. abominacioun, -cion, F.
   abominatio. See Abominate.]
   1. The feeling of extreme disgust and hatred; abhorrence;
      detestation; loathing; as, he holds tobacco in
      abomination.
      [1913 Webster]

   2. That which is abominable; anything hateful, wicked, or
      shamefully vile; an object or state that excites disgust
      and hatred; a hateful or shameful vice; pollution.
      [1913 Webster]

            Antony, most large in his abominations. --Shak.
      [1913 Webster]

   3. A cause of pollution or wickedness.
      [1913 Webster]

   Syn: Detestation; loathing; abhorrence; disgust; aversion;
        loathsomeness; odiousness. --Sir W. Scott.
        [1913 Webster]

WordNet (r) 3.0 (2006):

abomination
    n 1: a person who is loathsome or disgusting
    2: hate coupled with disgust [syn: abhorrence, abomination,
       detestation, execration, loathing, odium]
    3: an action that is vicious or vile; an action that arouses
       disgust or abhorrence; "his treatment of the children is an
       abomination"

Moby Thesaurus II by Grady Ward, 1.0:

116 Moby Thesaurus words for "abomination":
   Anglophobia, Russophobia, abhorrence, allergy, anathema, annoyance,
   antagonism, anti-Semitism, antipathy, atrocity, aversion, bad,
   bane, befoulment, besmirchment, bete noire, bigotry, blight, bogey,
   bugaboo, bugbear, cold sweat, contamination, contempt, corruption,
   creeping flesh, crying evil, damage, defilement, desecration,
   despite, despitefulness, despoliation, destruction, detestation,
   detriment, dirtying, disdain, disfavor, disgrace, disgust, dislike,
   disrelish, distaste, enmity, error, evil, execration, grievance,
   harm, hate, hatred, havoc, horror, hostility, hurt, ignominy, ill,
   incubus, infamy, infection, iniquity, injury, knavery, loathing,
   malevolence, malice, malignity, misandry, misanthropy, mischief,
   misogyny, mortal horror, nausea, obliquity, odium, outrage,
   peccancy, peeve, pest, pet peeve, phobia, pity, plague, poison,
   pollution, profanation, race hatred, racism, reprobacy, repugnance,
   repulsion, revulsion, ritual uncleanness, sacrilege, scandal,
   scorn, shame, shuddering, sin, soiling, spite, spitefulness,
   terrible thing, the worst, toxin, trial, venom, vexation,
   vials of hate, vials of wrath, villainy, violation, woe, wrong,
   xenophobia



Easton's 1897 Bible Dictionary:

Abomination
   This word is used, (1.) To express the idea that the Egyptians
   considered themselves as defiled when they ate with strangers
   (Gen. 43:32). The Jews subsequently followed the same practice,
   holding it unlawful to eat or drink with foreigners (John 18:28;
   Acts 10:28; 11:3).

     (2.) Every shepherd was "an abomination" unto the Egyptians
   (Gen. 46:34). This aversion to shepherds, such as the Hebrews,
   arose probably from the fact that Lower and Middle Egypt had
   formerly been held in oppressive subjection by a tribe of nomad
   shepherds (the Hyksos), who had only recently been expelled, and
   partly also perhaps from this other fact that the Egyptians
   detested the lawless habits of these wandering shepherds.

     (3.) Pharaoh was so moved by the fourth plague, that while he
   refused the demand of Moses, he offered a compromise, granting
   to the Israelites permission to hold their festival and offer
   their sacrifices in Egypt. This permission could not be
   accepted, because Moses said they would have to sacrifice "the
   abomination of the Egyptians" (Ex. 8:26); i.e., the cow or ox,
   which all the Egyptians held as sacred, and which they regarded
   it as sacrilegious to kill.

     (4.) Daniel (11:31), in that section of his prophecies which
   is generally interpreted as referring to the fearful calamities
   that were to fall on the Jews in the time of Antiochus
   Epiphanes, says, "And they shall place the abomination that
   maketh desolate." Antiochus Epiphanes caused an altar to be
   erected on the altar of burnt-offering, on which sacrifices were
   offered to Jupiter Olympus. (Comp. 1 Macc. 1:57). This was the
   abomination of the desolation of Jerusalem. The same language is
   employed in Dan. 9:27 (comp. Matt. 24:15), where the reference
   is probably to the image-crowned standards which the Romans set
   up at the east gate of the temple (A.D. 70), and to which they
   paid idolatrous honours. "Almost the entire religion of the
   Roman camp consisted in worshipping the ensign, swearing by the
   ensign, and in preferring the ensign before all other gods."
   These ensigns were an "abomination" to the Jews, the
   "abomination of desolation."

     This word is also used symbolically of sin in general (Isa.
   66:3); an idol (44:19); the ceremonies of the apostate Church of
   Rome (Rev. 17:4); a detestable act (Ezek. 22:11).