The Collaborative International Dictionary of English v.0.48:

Lust \Lust\, n. [AS. lust, lust, pleasure, longing; akin to OS.,
   D., G., & Sw. lust, Dan. & Icel. lyst, Goth lustus, and perh.
   tom Skr. lush to desire, or to E. loose. Cf. List to
   please, Listless.]
   1. Pleasure. [Obs.] " Lust and jollity." --Chaucer.
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   2. Inclination; desire. [Obs.]
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            For little lust had she to talk of aught. --Spenser.
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            My lust to devotion is little.        --Bp. Hall.
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   3. Longing desire; eagerness to possess or enjoy; -- in a had
      sense; as, the lust of gain.
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            The lust of reigning. --Milton.
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   4. Licentious craving; a strong sexual appetite. --Milton.
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   5. Hence: Virility; vigor; active power. [Obs.] --Bacon.
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The Collaborative International Dictionary of English v.0.48:

Lust \Lust\, v. i. [imp. & p. p. Lusted; p. pr. & vb. n.
   Lusting.] [AS. lystan. See Lust, n., and cf. List to
   choose.]
   1. To list; to like. [Obs.] --Chaucer. " Do so if thou lust.
      " --Latimer.
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   Note: In earlier usage lust was impersonal.
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               In the water vessel he it cast
               When that him luste.               --Chaucer.
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   2. To have an eager, passionate, and especially an inordinate
      or sinful desire, as for the gratification of the sexual
      appetite or of covetousness; -- often with after.
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            Whatsoever thy soul lusteth after.    --Deut. xii.
                                                  15.
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            Whosoever looketh on a woman to lust after her, hath
            committed adultery with her already in his heart.
                                                  --Matt. v. 28.
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            The spirit that dwelleth in us lusteth to envy.
                                                  --James iv. 5.
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WordNet (r) 3.0 (2006):

lust
    n 1: a strong sexual desire [syn: lecherousness, lust,
         lustfulness]
    2: self-indulgent sexual desire (personified as one of the
       deadly sins) [syn: lust, luxuria]
    v 1: have a craving, appetite, or great desire for [syn:
         crave, hunger, thirst, starve, lust]