The Collaborative International Dictionary of English v.0.48:

bullying \bullying\ adj.
   Noisily domineering; tending to browbeat others.

   Syn: blustery.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Bully \Bul"ly\, v. t. [imp. & p. p. Bullied (b[.u]l"l[=e]d);
   p. pr. & vb. n. Bullying.]
   To intimidate or badger with threats and by an overbearing,
   swaggering demeanor; to act the part of a bully[1] toward.
   [1913 Webster]

         For the last fortnight there have been prodigious
         shoals of volunteers gone over to bully the French,
         upon hearing the peace was just signing. --Tatler.
   [1913 Webster]

   Syn: To bluster; swagger; hector; domineer.
        [1913 Webster]

WordNet (r) 3.0 (2006):

bullying
    adj 1: noisily domineering; tending to browbeat others [syn:
           blustery, bullying]
    n 1: the act of intimidating a weaker person to make them do
         something [syn: bullying, intimidation]