The Collaborative International Dictionary of English v.0.48:

Dalliance \Dal"li*ance\, n. [From Dally.]
   1. The act of dallying, trifling, or fondling; interchange of
      caresses; wanton play.
      [1913 Webster]

            Look thou be true, do not give dalliance
            Too much the rein.                    --Shak.
      [1913 Webster]

            O, the dalliance and the wit,
            The flattery and the strife!          --Tennyson.
      [1913 Webster]

   2. Delay or procrastination. --Shak.
      [1913 Webster]

   3. Entertaining discourse. [Obs.] --Chaucer.
      [1913 Webster]

WordNet (r) 3.0 (2006):

dalliance
    n 1: the deliberate act of delaying and playing instead of
         working [syn: dalliance, dawdling, trifling]
    2: playful behavior intended to arouse sexual interest [syn:
       flirt, flirting, flirtation, coquetry, dalliance,
       toying]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "dalliance":
   amorous dalliance, amorous looks, billing and cooing, bundling,
   caressing, come-hither look, coquetry, coquettish glances,
   coquettishness, coyness, cuddling, dabbling, dallying, dawdling,
   dilatoriness, dillydallying, fiddling, flirtation, flirtatiousness,
   fondling, fooling, fooling around, goo-goo eyes, hugging, idling,
   jerking off, kidding around, kissing, lag, lagging, lingering,
   loitering, lollygagging, lovemaking, messing around, monkeying,
   monkeying around, necking, nestling, nuzzling, ogle, petting,
   piddling, playing, playing around, pottering, procrastination,
   puttering, sexual intercourse, shilly-shallying, smattering,
   snuggling, spooning, tarriance, tarrying, tinkering, toying,
   trifling, waiting