Someone who is ~ spends a lot of time or energy in supporting something that they believe in very strongly, especially a political or religious ideal.
She was a ~ worker for charitable bodies...
ADJ
Someone who is ~ spends a lot of time or energy in supporting something that they believe in very strongly, especially a political or religious ideal.
She was a ~ worker for charitable bodies...
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012