Meaning of “infidel” in the English Dictionary

british dictionary

"infidel" in British English

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infidelnoun [ C or U ]

uk /ˈɪn.fɪ.dəl/ us /ˈɪn.fə.del/ offensive

(used especially between Christians and Muslims) someone who does not have the same religious beliefs as the person speaking:

He lived among infidels/the infidel.
infidel armies

(Definition of “infidel” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)