The Collaborative International Dictionary of English v.0.48:

Envious \En"vi*ous\, a. [OF. envios, F. envieux, fr. L.
   invidiosus, fr. invidia envy. See Envy, and cf.
   Invidious.]
   1. Malignant; mischievous; spiteful. [Obs.]
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            Each envious brier his weary legs doth scratch.
                                                  --Shak.
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   2. Feeling or exhibiting envy; actuated or directed by, or
      proceeding from, envy; -- said of a person, disposition,
      feeling, act, etc.; jealously pained by the excellence or
      good fortune of another; maliciously grudging; -- followed
      by of, at, and against; as, an envious man, disposition,
      attack; envious tongues.
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            My soul is envious of mine eye.       --Keble.
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            Neither be thou envious at the wicked. --Prov. xxiv.
                                                  19.
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   3. Inspiring envy. [Obs. or Poetic]
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            He to him leapt, and that same envious gage
            Of victor's glory from him snatched away. --Spenser.
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   4. Excessively careful; cautious. [Obs.]
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            No men are so envious of their health. --Jer.
                                                  Taylor.
      -- En"vi*ous*ly, adv. -- En"vi*ous*ness, n.
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WordNet (r) 3.0 (2006):

envious
    adj 1: showing extreme cupidity; painfully desirous of another's
           advantages; "he was never covetous before he met her";
           "jealous of his success and covetous of his possessions";
           "envious of their art collection" [syn: covetous,
           envious, jealous]

Moby Thesaurus II by Grady Ward, 1.0:

66 Moby Thesaurus words for "envious":
   beefing, begrudging, bellyaching, bitching, complaining,
   complaintful, coveting, covetous, crabbing, crabby, cranky,
   croaking, desirous, desirous of, disappointed, discontented,
   disgruntled, displeased, dissatisfied, distrustful, envying,
   faultfinding, grasping, greedy, green, green with envy,
   green with jealousy, green-eyed, griping, grouchy, grousing,
   growling, grudging, grumbling, horn-mad, invidious, jaundice-eyed,
   jaundiced, jealous, longing, malcontent, malcontented, murmuring,
   muttering, out of humor, peevish, petulant, querulant, querulous,
   rebellious, resentful, restive, restless, sulky, suspicious,
   unaccepting, unaccommodating, uneasy, unfulfilled, ungratified,
   unhappy, unsatisfied, whiny, yearning, yellow, yellow-eyed