|infə|deləd.ē, -ətē, -i sometimes -ˌfī|- noun
Etymology: Middle French infidelité, from Late Latin & Latin; Late Latin infidelitat-, infidelitas disbelief in Christianity, heathenism, from Latin, unfaithfulness, from infidelis + -itat-, -itas -ity
1. : lack of faith or belief in a religion : state or character of being infidel
2. archaic : skepticism , incredulity
3.
a. : breach of trust : unfaithfulness to a charge or a moral obligation : disloyalty , perfidy
b. : marital unfaithfulness or an instance of it
made no secret of his many infidelities
4. : failure to reproduce (as a text or a model) exactly ; also : an instance of such failure
numerous infidelities in the translation
infidelity in size also made printing from … plastic plates a hazard — Graphic Arts Review