An infidel (literally "one without faith") is an offensive English word meaning "one who doubts or rejects central tenets of a religion or has no religious beliefs", especially in reference to Christianity or Islam.



Agnosticism
Antitheism
Apostasy
Atheism
Blasphemy
Heathen
Definition of "infidel" by the Merriam-Webster dictionary
Definition of "unbeliever" by the Merriam-Webster dictionary
Definition of "kafir" by the Merriam-Webster dictionary