The Collaborative International Dictionary of English v.0.48:

stare \stare\, v. i. [imp. & p. p. stared (st[^a]rd); p. pr. &
   vb. n. staring.] [AS. starian; akin to LG. & D. staren,
   OHG. star[=e]n, G. starren, Icel. stara; cf. Icel. stira,
   Dan. stirre, Sw. stirra, and G. starr stiff, rigid, fixed,
   Gr. stereo`s solid (E. stereo-), Skr. sthira firm, strong.
   [root]166. Cf. Sterile.]
   1. To look with fixed eyes wide open, as through fear,
      wonder, surprise, impudence, etc.; to fasten an earnest
      and prolonged gaze on some object.
      [1913 Webster]

            For ever upon the ground I see thee stare.
                                                  --Chaucer.
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            Look not big, nor stamp, nor stare, nor fret.
                                                  --Shak.
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   2. To be very conspicuous on account of size, prominence,
      color, or brilliancy; as, staring windows or colors.
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   3. To stand out; to project; to bristle. [Obs.]
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            Makest my blood cold, and my hair to stare. --Shak.
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            Take off all the staring straws and jags in the
            hive.                                 --Mortimer.
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   Syn: To gaze; to look earnestly. See Gaze.
        [1913 Webster]

WordNet (r) 3.0 (2006):

staring
    adj 1: (used of eyes) open and fixed as if in fear or wonder;
           "staring eyes" [syn: agaze, staring]
    2: without qualification; used informally as (often pejorative)
       intensifiers; "an arrant fool"; "a complete coward"; "a
       consummate fool"; "a double-dyed villain"; "gross
       negligence"; "a perfect idiot"; "pure folly"; "what a sodding
       mess"; "stark staring mad"; "a thoroughgoing villain"; "utter
       nonsense"; "the unadulterated truth" [syn: arrant(a),
       complete(a), consummate(a), double-dyed(a),
       everlasting(a), gross(a), perfect(a), pure(a),
       sodding(a), stark(a), staring(a), thoroughgoing(a),
       utter(a), unadulterated]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "staring":
   agape, aghast, agog, all agog, amazed, arrant, astonished,
   astounded, at gaze, awed, awestruck, beguiled, bewildered,
   bewitched, blatant, bold, breathless, captivated, clean-cut, clear,
   clear as crystal, clear-cut, confounded, conspicuous,
   crystal-clear, defined, definite, distinct, dumbfounded,
   dumbstruck, enchanted, enraptured, enravished, enthralled,
   entranced, evident, fascinated, flabbergasted, flagrant, gaping,
   gauping, gazing, glaring, hanging out, hypnotized, in awe,
   in awe of, in focus, in relief, in the foreground, lost in wonder,
   marveling, mesmerized, notable, noticeable, notorious, obtrusive,
   obvious, open-eyed, openmouthed, ostensible, outstanding,
   overwhelmed, patent, plain, popeyed, prominent, pronounced,
   puzzled, rapt in wonder, salient, spellbound, staggered,
   stark-staring, sticking out, striking, stupefied, surprised,
   thunderstruck, under a charm, unmistakable, well-defined,
   well-marked, well-pronounced, well-resolved, wide-eyed,
   wonder-struck, wondering