D defs.my
Entry 2 senses Webster, 1913

Billy

/(bĭl"ly̆)/ · Bil·ly · IPA /ˈbɪli/
01 n. A club; esp., a policeman's club. Also called billy club.
  1. 1.
    A club; esp., a policeman's club. Also called billy club. Also: billy club
  2. 2.
    A slubbing or roving machine.(Wool Manuf.)