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]

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "lust":
   acedia, ache, ache for, acquisitiveness, ambition, andromania,
   anger, animality, animus, aphrodisia, appetence, appetency,
   appetite, appetition, avarice, avariciousness, avaritia, avidity,
   avidness, bawdiness, biological urge, bodily appetite,
   carnal desire, carnality, choice, clitoromania, command, conation,
   conatus, concupiscence, coveting, covetousness, crave, craving,
   cupidity, deadly sin, decision, desire, determination, dirtiness,
   discretion, disposition, drive, energy, envy, eromania, eroticism,
   eroticomania, eroticomaniac, erotism, erotomania, excitement,
   fancy, fervor, fleshliness, fleshly lust, free choice, free will,
   frenzy of desire, furor uterinus, fury of desire, gluttony,
   goatishness, grasping, graspingness, greed, greediness, gula,
   gynecomania, hanker, heat, hoggishness, horniness, hot blood,
   hot pants, hunger, hysteromania, inclination, incontinence,
   indecency, infantile sexuality, inordinate desire, insatiability,
   insatiable desire, intemperateness, intention, invidia, ira, itch,
   itching palm, lasciviousness, lecherousness, lechery, lewdness,
   libidinousness, libido, lickerishness, liking, lubriciousness,
   lubricity, lust after, lustfulness, luxuria, mind, nymphomania,
   objective, obscenity, overgreediness, passion, piggishness, pine,
   pleasure, polymorphous perversity, priapism, pride, prurience,
   pruriency, randiness, rapaciousness, rapacity, ravenousness,
   resolution, rut, salaciousness, salacity, satyriasis, satyrism,
   sensuality, sexiness, sexual desire, sexual longing,
   sexual passion, sexuality, sloth, sordidness, superbia,
   swinishness, thirst, urge, uteromania, velleity, venereal appetite,
   volition, voraciousness, voracity, will, will power, wish,
   wolfishness, wrath, yearn, yearning, yen



Easton's 1897 Bible Dictionary:

Lust
   sinful longing; the inward sin which leads to the falling away
   from God (Rom. 1:21). "Lust, the origin of sin, has its place in
   the heart, not of necessity, but because it is the centre of all
   moral forces and impulses and of spiritual activity." In Mark
   4:19 "lusts" are objects of desire.