[noun] [C]A believer is a person who has a religious belief or who has confidence in the good of something.She's became a believer after she survived a terrible accident.Harvey's a (great) believer in health food.I'm a (great) believer in allowing people to make their own mistakes.
BELIEVER
Meaning of BELIEVER in English
Cambridge English vocab. Кембриджский английский словарь. 2012