fanatic /fəˈnæt.ɪk/adjective 2noun 1forms 3 adjective2 •Fanatical.But Faith, fanatic Faith, once wedded fast / To some dear falsehood, hugs it to the last. — 1817 •(no longer used) Showing evidence of possession by a god or demon; frenzied, overzealous. noun1 •A person who is zealously enthusiastic for some cause.A zealot can't change his mind. A fanatic can't change his mind and won't change the subject. —Winston Churchill (attributed)A fanatic is one who redoubles his effort when he has forgotten his aim. —George Santayana formsfanatics · more fanatic · most fanatic