ad·vo·ca·cy \ˈadvəkəsē, -si\noun (-es) Etymology: Middle English advocacie, from Middle French advocacie, from Medieval Latin advocatia, from Latin advocatus + -ia 1.: the profession or work of an advocate 2.: the action of advocating, pleading for, or supporting < devoted a lifetime to the advocacy of economic reforms > < a consequence of his moving advocacy — W.O.Douglas >