/bɪˈli:və(r) ||; bɪˈlivɚ/noun [C] a person who has religious beliefs （宗教）信徒 be a (great/firm) believer in sth to think that sth is good or right （坚决）相信某事物是好的或正确的: He is a great believer in getting things done on time. 他坚信办事就应该按时办妥。