The Collaborative International Dictionary of English v.0.48:

Wanton \Wan"ton\, v. t.
   To cause to become wanton; also, to waste in wantonness.
   [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wanton \Wan"ton\, n.
   1. A roving, frolicsome thing; a trifler; -- used rarely as a
      term of endearment.
      [1913 Webster]

            I am afeard you make a wanton of me.  --Shak.
      [1913 Webster]

            Peace, my wantons; he will do
            More than you can aim unto.           --B. Jonson.
      [1913 Webster]

   2. One brought up without restraint; a pampered pet.
      [1913 Webster]

            Anything, sir,
            That's dry and wholesome; I am no bred wanton.
                                                  --Beau. & Fl.
      [1913 Webster]

   3. A lewd person; a lascivious man or woman.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wanton \Wan"ton\, a. [OE. wantoun, contr. from wantowen; pref.
   wan- wanting (see Wane, v. i.), hence expressing negation +
   towen, p. p., AS. togen, p. p. of te['o]n to draw, to
   educate, bring up; hence, properly, ill bred. See Tug, v.
   t.]
   [1913 Webster]
   1. Untrained; undisciplined; unrestrained; hence, loose;
      free; luxuriant; roving; sportive. "In woods and wanton
      wilderness." --Spenser. "A wild and wanton herd." --Shak.
      [1913 Webster]

            A wanton and a merry [friar].         --Chaucer.
      [1913 Webster]

            [She] her unadorned golden tresses wore
            Disheveled, but in wanton ringlets waved. --Milton.
      [1913 Webster]

            How does your tongue grow wanton in her praise!
                                                  --Addison.
      [1913 Webster]

   2. Wandering from moral rectitude; perverse; dissolute. "Men
      grown wanton by prosperity." --Roscommon.
      [1913 Webster]

   3. Specifically: Deviating from the rules of chastity; lewd;
      lustful; lascivious; libidinous; lecherous.
      [1913 Webster]

            Not with wanton looking of folly.     --Chaucer.
      [1913 Webster]

            [Thou art] froward by nature, enemy to peace,
            Lascivious, wanton.                   --Shak.
      [1913 Webster]

   4. Reckless; heedless; as, wanton mischief.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wanton \Wan"ton\, v. i. [imp. & p. p. Wantoned; p. pr. & vb.
   n. Wantoning.]
   [1913 Webster]
   1. To rove and ramble without restraint, rule, or limit; to
      revel; to play loosely; to frolic.
      [1913 Webster]

            Nature here wantoned as in her prime. --Milton.
      [1913 Webster]

            How merrily we would sally into the fields, and
            strip under the first warmth of the sun, and wanton
            like young dace in the streams!       --Lamb.
      [1913 Webster]

   2. To sport in lewdness; to play the wanton; to play
      lasciviously.
      [1913 Webster]

WordNet (r) 3.0 (2006):

wanton
    adj 1: occurring without motivation or provocation; "motiveless
           malignity"; "unprovoked and dastardly attack"-
           F.D.Roosevelt [syn: motiveless, unprovoked, wanton]
    2: casual and unrestrained in sexual behavior; "her easy
       virtue"; "he was told to avoid loose (or light) women";
       "wanton behavior" [syn: easy, light, loose,
       promiscuous, sluttish, wanton]
    n 1: lewd or lascivious woman
    v 1: waste time; spend one's time idly or inefficiently [syn:
         piddle, wanton, wanton away, piddle away, trifle]
    2: indulge in a carefree or voluptuous way of life
    3: spend wastefully; "wanton one's money away" [syn: wanton,
       wanton away, trifle away]
    4: become extravagant; indulge (oneself) luxuriously [syn:
       luxuriate, wanton]
    5: engage in amorous play
    6: behave extremely cruelly and brutally

Moby Thesaurus II by Grady Ward, 1.0:

312 Moby Thesaurus words for "wanton":
   Adamic, Casanova, Don Juan, Jezebel, Lothario, Paphian, abandoned,
   accident-prone, adrift, afloat, alternating, amorphous, arbitrary,
   backsliding, bad woman, baggage, bat, baton, be promiscuous,
   bill and coo, billy club, bitch, bludgeon, breakneck, broad,
   capricious, careless, carnal, carouse, celebrate, chambering,
   changeable, changeful, chase women, chippy, clitoromaniac, club,
   cocotte, commit adultery, contrary, coo, copulate, cranky,
   crotchety, cut loose, cyprian, dally, debauch, debauchee,
   desperate, desultory, deviable, devil-may-care, dissipate, dizzy,
   drab, easy, easy lay, easy woman, eccentric, erratic, erring,
   fallen, fanciful, fantasied, fantastic, fast and loose, fickle,
   fitful, flaky, fleshly, flickering, flighty, flirt, flitting,
   floozy, fluctuating, fool, fornicate, frail, frail sister,
   freakish, furious, gallant, gay deceiver, gay dog, giddy, go-go,
   gratuitous, grisette, grovel, harebrained, harridan, harum-scarum,
   hasty, headlong, hell around, hotheaded, humorsome, hurried, hussy,
   hysteromaniac, immoderate, impetuous, impulsive, impure,
   inconsistent, inconstant, incontinent, indecisive, indulgent,
   infirm, intemperate, irregular, irrepressible, irresolute,
   irresponsible, jade, jezebel, jollify, jolly, kinky, lady-killer,
   lapsed, lark, lax, lead, let go, let loose, let off steam,
   libertine, licentious, light, live hard, lollygag, loose,
   loose woman, loose-moraled, lover-boy, mace, mad, maggoty,
   make love, make merry, make out, make whoopee, malevolent,
   malicious, mazy, mercurial, moody, motiveless, neck,
   nonrestrictive, notional, nymphet, nympho, nymphomaniac,
   of easy virtue, of loose morals, out of control, out of hand,
   overeager, overenthusiastic, overzealous, peccable, permissive,
   perverse, pet, petulant, philander, philanderer, pickup, pig,
   plunge into dissipation, postlapsarian, precipitant, precipitate,
   precipitous, prodigal, profligate, promiscuous, prostitute, quean,
   quirky, raise hell, rake, rakehell, rambling, rampant, recidivist,
   recidivistic, reckless, reinless, restless, revel, riotous, rip,
   roister, roue, rounder, roving, run riot, scatterbrained, see life,
   shapeless, shifting, shifty, shillelagh, shuffling, skirt chaser,
   skylark, slack, slap-bang, slapdash, slattern, sleep around, slut,
   smooch, spasmodic, spineless, spiteful, spoon, spree, step out,
   strumpet, sweet-talk, swing, swinger, tart, temperamental, toy,
   tramp, trifle, trollop, trull, truncheon, unaccountable, unangelic,
   unasked, unbridled, uncalled-for, uncertain, unchaste, unchecked,
   unclean, uncoerced, uncompelled, unconstrained, uncontrolled,
   uncurbed, undependable, undisciplined, unfixed, unforced, ungodly,
   ungood, ungoverned, uninhibited, unmastered, unmeasured, unmuzzled,
   unpredictable, unreasonable, unreined, unreliable, unrepressed,
   unreserved, unrestrained, unrestrictive, unrighteous, unruly,
   unsaintly, unsettled, unstable, unstable as water, unstaid,
   unsteadfast, unsteady, unsubdued, unsuppressed, unvirtuous,
   uteromaniac, vacillating, vagarious, vagrant, variable,
   vicissitudinary, vicissitudinous, virtueless, volatile,
   walking phallus, wallow, wandering, war club, wavering, wavery,
   wavy, wayward, weak, wench, whimsical, whisper sweet nothings,
   whoop it up, whore, whorish, wild, wishy-washy, wolf, woman chaser,
   womanize, womanizer