The Collaborative International Dictionary of English v.0.48:

Hug \Hug\, v. i. [imp. & p. p. Hugged; p. pr. & vb. n.
   Hugging.] [Prob. of Scand. origin; cf. Dan. sidde paa huk
   to squat, Sw. huka sig to squat, Icel. h?ka. Cf. Huckster.]
   1. To cower; to crouch; to curl up. [Obs.] --Palsgrave.
      [1913 Webster]

   2. To crowd together; to cuddle. [Obs.] --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

hugging \hugging\ n.
   Affectionate embracing; caressing.

   Syn: caressing, cuddling, fondling, kissing, necking,
        petting, smooching, snuggling.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

hugging
    n 1: affectionate play (or foreplay without contact with the
         genital organs) [syn: caressing, cuddling, fondling,
         hugging, kissing, necking, petting, smooching,
         snuggling]