Source : Webster's Revised Unabridged Dictionary (1913)

Abroach \A*broach"\, v. t. [OE. abrochen, OF. abrochier. See
   {Broach}.]
   To set abroach; to let out, as liquor; to broach; to tap.
   [Obs.] --Chaucer.

Abroach \A*broach"\, adv. [Pref. a- + broach.]
   1. Broached; in a condition for letting out or yielding
      liquor, as a cask which is tapped.

            Hogsheads of ale were set abroach.    --Sir W.
                                                  Scott.

   2. Hence: In a state to be diffused or propagated; afoot;
      astir. ``Mischiefs that I set abroach.'' --Shak.

Source : WordNet®

abroach
     adj : of a cask or barrel; "the cask was set abroach" [syn: {broached}]