/ ˈædvəkəsi; NAmE / noun [ U ]
1.
advocacy (of sth) ( formal ) the giving of public support to an idea, a course of action or a belief
2.
( technical ) the work of lawyers who speak about cases in court
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WORD ORIGIN
late Middle English : via Old French from medieval Latin advocatia , from advocare summon, call to one's aid , from ad- to + vocare to call.