Source : Webster's Revised Unabridged Dictionary (1913)

Abominable \A*bom"i*na*ble\, a. [F. abominable. L. abominalis.
   See {Abominate}.]
   1. Worthy of, or causing, abhorrence, as a thing of evil
      omen; odious in the utmost degree; very hateful;
      detestable; loathsome; execrable.

   2. Excessive; large; -- used as an intensive. [Obs.]

   Note: Juliana Berners . . . informs us that in her time [15th
         c.], ``abomynable syght of monkes'' was elegant English
         for ``a large company of friars.'' --G. P. Marsh.

Source : WordNet®

abominable
     adj 1: unequivocally detestable; "abominable treatment of
            prisoners"; "detestable vices"; "execrable crimes";
            "consequences odious to those you govern"- Edmund
            Burke [syn: {detestable}, {execrable}, {odious}]
     2: exceptionally bad or displeasing; "atrocious taste";
        "abominable workmanship"; "an awful voice"; "dreadful
        manners"; "a painful performance"; "terrible handwriting";
        "an unspeakable odor came sweeping into the room" [syn: {atrocious},
         {awful}, {dreadful}, {painful}, {terrible}, {unspeakable}]