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
1
: not holding the faith of a given religion
Either they must come to terms with surrounding infidel tribes or they must conquer the hinterland.—
Daniel J. Boorstin
2
: opposing or traitorous to a given religion
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Merriam-Webster unabridged
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