The Collaborative International Dictionary of English v.0.48:

Luck \Luck\, n. [Akin to D. luk, geluk, G. gl["u]ck, Icel.
   lukka, Sw. lycka, Dan. lykke, and perh. to G. locken to
   entice. Cf. 3d Gleck.]
   That which happens to a person; an event, good or ill,
   affecting one's interests or happiness, and which is deemed
   casual; a course or series of such events regarded as
   occurring by chance; chance; hap; fate; fortune; often, one's
   habitual or characteristic fortune; as, good, bad, ill, or
   hard luck. Luck is often used by itself to mean good luck;
   as, luck is better than skill; a stroke of luck.
   [1913 Webster]

         If thou dost play with him at any game,
         Thou art sure to lose; and of that natural luck,
         He beats thee 'gainst the odds.          --Shak.
   [1913 Webster]

   Luck penny, a small sum given back for luck to one who pays
      money. [Prov. Eng.]

   To be in luck, to receive some good, or to meet with some
      success, in an unexpected manner, or as the result of
      circumstances beyond one's control; to be fortunate.
      [1913 Webster]

WordNet (r) 3.0 (2006):

luck
    n 1: your overall circumstances or condition in life (including
         everything that happens to you); "whatever my fortune may
         be"; "deserved a better fate"; "has a happy lot"; "the luck
         of the Irish"; "a victim of circumstances"; "success that
         was her portion" [syn: fortune, destiny, fate,
         luck, lot, circumstances, portion]
    2: an unknown and unpredictable phenomenon that causes an event
       to result one way rather than another; "bad luck caused his
       downfall"; "we ran into each other by pure chance" [syn:
       luck, fortune, chance, hazard]
    3: an unknown and unpredictable phenomenon that leads to a
       favorable outcome; "it was my good luck to be there"; "they
       say luck is a lady"; "it was as if fortune guided his hand"
       [syn: luck, fortune]

Moby Thesaurus II by Grady Ward, 1.0:

94 Moby Thesaurus words for "luck":
   accident, accidentality, actuarial calculation, adventitiousness,
   blessing, break, bump, calculated risk, capriciousness, casualness,
   chance, chances, chanciness, changeableness, destiny, erraticism,
   erraticness, fate, felicity, fickleness, flier, fluke, flukiness,
   fortuitousness, fortuity, fortunateness, fortune, fortunes, gamble,
   good fortune, good luck, hap, happenstance, happy chance,
   happy fortune, hazard, heedless hap, hesitancy, hesitation, hit,
   how they fall, incalculability, incertitude, indecision,
   indecisiveness, indemonstrability, indeterminacy,
   indeterminateness, indetermination, indeterminism, irresolution,
   law of averages, light, lot, luckiness, meet, moira, occasion,
   opportunity, play, plunge, principle of indeterminacy, probability,
   problematicness, random sample, randomness, risk, run of luck,
   serendipity, smiles of fortune, speculation,
   statistical probability, stroke of luck, stumble, suspense,
   suspensefulness, the breaks, theory of probability, tumble,
   unaccountability, uncertainness, uncertainty,
   uncertainty principle, undecidedness, undeterminedness,
   unforeseeableness, unpredictability, unprovability, unsureness,
   unverifiability, vacillation, venture, whatever comes,
   whimsicality



U.S. Gazetteer Places (2000):

Luck, WI -- U.S. village in Wisconsin
   Population (2000):    1210
   Housing Units (2000): 572
   Land area (2000):     1.849465 sq. miles (4.790091 sq. km)
   Water area (2000):    0.593145 sq. miles (1.536238 sq. km)
   Total area (2000):    2.442610 sq. miles (6.326329 sq. km)
   FIPS code:            46200
   Located within:       Wisconsin (WI), FIPS 55
   Location:             45.570499 N, 92.474760 W
   ZIP Codes (1990):     54853
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Luck, WI
    Luck