| 1. | Religion.
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| 2. | a person who has no religious faith; unbeliever. |
| 3. | (loosely) a person who disbelieves or doubts a particular theory, belief, creed, etc.; skeptic. |
| 4. | not accepting a particular faith, esp. Christianity or Islam; heathen. |
| 5. | without religious faith. |
| 6. | due to or manifesting unbelief: infidel ideas. |
| 7. | rejecting the Christian religion while accepting no other; not believing in the Bible or any Christian divine revelation. |
| 8. | Also, in⋅fi⋅del⋅ic [in-fi-del-ik] . of, pertaining to, or characteristic of unbelievers or infidels. |