- (n.) Unfaithfulness to the marriage vow or contract; violation of the marriage covenant by adultery.
- (n.) Breach of trust; unfaithfulness to a charge or to moral obligation; treachery; deceit; as, the infidelity of a servant.
- (n.) Want of faith or belief in some religious system; especially, a want of faith in or disbelief of, the inspiration of the Scriptures, of the divine origin of Christianity.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). infidelity. Retrieved September 22, 2026, from http://smartdefine.org/infidelity/definitions/2021389 |
| Chicago | Webster's. 2011. "infidelity" http://smartdefine.org/infidelity/definitions/2021389 (accessed September 22, 2026). |
| Harvard | Webster's 2011, infidelity, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/infidelity/definitions/2021389>. |
| MLA | Webster's. "infidelity" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/infidelity/definitions/2021389> |