The Collaborative International Dictionary of English v.0.48:

Browbeat \Brow"beat`\, v. t. [imp. Browbeat; p. p.
   Browbeaten; p. pr. & vb. n. Browbeating.]
   To depress or bear down with haughty, stern looks, or with
   arrogant speech and dogmatic assertions; to abash or
   disconcert by impudent or abusive words or looks; to bully;
   as, to browbeat witnesses.
   [1913 Webster]

         My grandfather was not a man to be browbeaten. --W.
                                                  Irving.
   [1913 Webster]

WordNet (r) 3.0 (2006):

browbeat
    v 1: be bossy towards; "Her big brother always bullied her when
         she was young" [syn: strong-arm, bully, browbeat,
         bullyrag, ballyrag, boss around, hector, push
         around]
    2: discourage or frighten with threats or a domineering manner;
       intimidate [syn: browbeat, bully, swagger]