n.
Pronunciation: ' in-f ə -d ə l, -f ə - ˌ del
Function: noun
Etymology: Middle English infidele, from Middle French, from Late Latin infidelis unbelieving, from Latin, unfaithful, from in- + fidelis faithful ― more at FIDELITY
Date: 15th century
1 : one who is not a Christian or who opposes Christianity
2 a : an unbeliever with respect to a particular religion b : one who acknowledges no religious belief
3 : a disbeliever in something specified or understood
– infidel adjective