Source : Webster's Revised Unabridged Dictionary (1913)

Refresher \Re*fresh"er\ (-?r), n.
   1. One who, or that which, refreshes.

   2. (Law) An extra fee paid to counsel in a case that has been
      adjourned from one term to another, or that is unusually
      protracted.

            Ten guineas a day is the highest refresher which a
            counsel can charge.                   --London
                                                  Truth.

Source : WordNet®

refresher
     n 1: a fee (in addition to that marked on the brief) paid to
          counsel in a case that lasts more than one day
     2: a drink that refreshes; "he stopped at the bar for a quick
        refresher"
     3: a course that reviews and updates a topic for those who have
        not kept abreast of developments [syn: {refresher course}]