The Collaborative International Dictionary of English v.0.48:

Bauk \Bauk\, Baulk \Baulk\, n. & v.
   See Balk.
   [1913 Webster]

WordNet (r) 3.0 (2006):

baulk
    n 1: the area on a billiard table behind the balkline; "a player
         with ball in hand must play from the balk" [syn: balk,
         baulk]
    2: something immaterial that interferes with or delays action or
       progress [syn: hindrance, hinderance, deterrent,
       impediment, balk, baulk, check, handicap]
    3: one of several parallel sloping beams that support a roof
       [syn: rafter, balk, baulk]
    v 1: refuse to comply [syn: resist, balk, baulk, jib]