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[in-fi-del-i-tee] /ˌɪn fɪˈdɛl ɪ ti/
noun, plural infidelities.
marital disloyalty; adultery.
unfaithfulness; disloyalty.
lack of religious faith, especially Christian faith.
a breach of trust or a disloyal act; transgression.
Origin of infidelity
late Middle English
1375-1425; late Middle English < Latin infidēlitās, equivalent to infidēli(s) unfaithful (see infidel) + -tās -ty2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for infidelities
Contemporary Examples
Historical Examples
  • Vera herself hadn't made her infidelities a point of honour.

    The Tree of Heaven May Sinclair
  • So may our soul repay her debt to God for her past infidelities.

    The Golden Fountain Lilian Staveley
  • Did I still love him despite his infidelities, his ever-increasing neglect and selfishness?

    My Actor-Husband Anonymous
  • We hear on all sides of the infidelities she permitted herself.

  • The next minute he begged her earnestly not to come near him again because her infidelities had made him loathe the sight of her.

    Captivity M. Leonora Eyles
  • George, by the way, hasn't the remotest idea of "Bert's" infidelities.

    Passing By Maurice Baring
  • The infidelities of the post offices, both of England and France, are not unknown to you.

British Dictionary definitions for infidelities


noun (pl) -ties
lack of faith or constancy, esp sexual faithfulness
lack of religious faith; disbelief
an act or instance of disloyalty
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for infidelities



c.1400, "want of faith, unbelief in religion; false belief, paganism;" also (early 15c.) "unfaithfulness or disloyalty to a person" (originally to a sovereign, by 16c. to a lover or spouse), from French infidélité, from Latin infidelitatem (nominative infidelitas) "unfaithfulness, faithlessness," noun of quality from infidelis (see infidel).

Online Etymology Dictionary, © 2010 Douglas Harper
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