a‧gent pro‧voc‧a‧teur /ˌæʒɒn prɒvɒkəˈtɜː $ ˌɑːʒɑːn proʊvɑːkəˈtɜːr/ noun (plural agents provocateurs (same pronunciation)) [countable]
[Date: 1800-1900; Language: French; Origin: 'provoking agent']
someone who is employed to encourage people who are working against a government to do something illegal so that they are caught

[TahlilGaran] Dictionary of Contemporary English ▲